When building the core with `-Wextra` a few locations have `case:`
fall throughs or skipped field initializers.
Add proper comments for B64 cases to avoid GCC warnings
Initialized unused fields in Tone and WiFiGeneric to avoid missing
field initializer warnings.
````
2022-05-19T17:40:42.2280300Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c: In function 'base64_decode_block_signed':
2022-05-19T17:40:42.2282122Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:42:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
2022-05-19T17:40:42.2283247Z *plainchar = (fragment & 0x03f) << 2;
2022-05-19T17:40:42.2284240Z ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
2022-05-19T17:40:42.2285087Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:43:7: note: here
2022-05-19T17:40:42.2285435Z case step_b:
2022-05-19T17:40:42.2285691Z ^~~~
2022-05-19T17:40:42.2286515Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:53:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
2022-05-19T17:40:42.2286932Z *plainchar = (fragment & 0x00f) << 4;
2022-05-19T17:40:42.2287219Z ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
2022-05-19T17:40:42.2287609Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:54:7: note: here
2022-05-19T17:40:42.2287909Z case step_c:
2022-05-19T17:40:42.2288200Z ^~~~
2022-05-19T17:40:42.2288972Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:64:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
2022-05-19T17:40:42.2289491Z *plainchar = (fragment & 0x003) << 6;
2022-05-19T17:40:42.2289745Z ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
2022-05-19T17:40:42.2290162Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cdecode.c:65:7: note: here
2022-05-19T17:40:42.2290509Z case step_d:
2022-05-19T17:40:42.2290714Z ^~~~
2022-05-19T17:40:42.2482744Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cencode.c: In function 'base64_encode_block':
2022-05-19T17:40:42.2484713Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cencode.c:46:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
2022-05-19T17:40:42.2485415Z result = (fragment & 0x003) << 4;
2022-05-19T17:40:42.2486713Z ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
2022-05-19T17:40:42.2487696Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cencode.c:47:9: note: here
2022-05-19T17:40:42.2488519Z case step_B:
2022-05-19T17:40:42.2489175Z ^~~~
2022-05-19T17:40:42.2492458Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cencode.c:56:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
2022-05-19T17:40:42.2493351Z result = (fragment & 0x00f) << 2;
2022-05-19T17:40:42.2494227Z ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
2022-05-19T17:40:42.2496324Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/libb64/cencode.c:57:9: note: here
2022-05-19T17:40:42.2496937Z case step_C:
2022-05-19T17:40:42.2497261Z ^~~~
2022-05-19T17:40:44.6354962Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp: In function 'void setToneChannel(uint8_t)':
2022-05-19T17:40:44.6356417Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:99:5: warning: missing initializer for member 'tone_msg_t::pin' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6357120Z };
2022-05-19T17:40:44.6358732Z ^
2022-05-19T17:40:44.6364470Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:99:5: warning: missing initializer for member 'tone_msg_t::frequency' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6367914Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:99:5: warning: missing initializer for member 'tone_msg_t::duration' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6372875Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp: In function 'void noTone(uint8_t)':
2022-05-19T17:40:44.6373943Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:110:5: warning: missing initializer for member 'tone_msg_t::frequency' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6375154Z };
2022-05-19T17:40:44.6375825Z ^
2022-05-19T17:40:44.6379852Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:110:5: warning: missing initializer for member 'tone_msg_t::duration' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6383291Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:110:5: warning: missing initializer for member 'tone_msg_t::channel' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6388688Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp: In function 'void tone(uint8_t, unsigned int, long unsigned int)':
2022-05-19T17:40:44.6389829Z /home/runner/arduino_ide/hardware/espressif/esp32/cores/esp32/Tone.cpp:128:5: warning: missing initializer for member 'tone_msg_t::channel' [-Wmissing-field-initializers]
2022-05-19T17:40:44.6390677Z };
2022-05-19T17:40:44.6391420Z ^
2022-05-19T17:42:00.6768353Z /home/runner/arduino_ide/hardware/espressif/esp32/libraries/WiFi/src/WiFiGeneric.cpp: In static member function 'static bool WiFiGenericClass::setDualAntennaConfig(uint8_t, uint8_t, wifi_rx_ant_t, wifi_tx_ant_t)':
2022-05-19T17:42:00.6769293Z /home/runner/arduino_ide/hardware/espressif/esp32/libraries/WiFi/src/WiFiGeneric.cpp:1333:5: warning: missing initializer for member 'wifi_ant_config_t::rx_ant_default' [-Wmissing-field-initializers]
2022-05-19T17:42:00.6769658Z };
2022-05-19T17:42:00.6769824Z ^
````
- Remove the execute bit from source and text files.
- on-pages.sh script needs the execute bit to be set.
Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
