#682 Add created() function for sprites

New function added:
  bool created(void);
to check if sprite has been rotated. Example:

if ( !spr.created() ) Serial.println("Sprite has not been created");

examples/320 x 240/TFT_Matrix/TFT_Matrix.ino

@@ -32,7 +32,7 @@ void setup() {
   Serial.begin(115200);
   randomSeed(analogRead(A0));
   tft.init();
-  tft.setRotation(2);
+  tft.setRotation(0);
   tft.fillScreen(ILI9341_BLACK);
   setupScrollArea(TOP_FIXED_AREA, BOT_FIXED_AREA);
 }

examples/DMA test/SpriteRotatingCube/SpriteRotatingCube.ino

@@ -6,7 +6,7 @@
 // parallel TFT's (tested with ILI9341 and ILI9481)
 
 // The sketch will run on processors without DMA and also parallel
-// interface TFT's. Comment out line 25 for no DMA.
+// interface TFT's. Comment out line 29 for no DMA.
 
 // Library here:
 // https://github.com/Bodmer/TFT_eSPI

examples/Smooth Fonts/FLASH_Array/Unicode_test/Unicode_test.ino

@@ -31,7 +31,6 @@
 //====================================================================================
 //                                  Libraries
 //====================================================================================
-// Call up the SPIFFS FLASH filing system this is part of the ESP Core
 
 #include <TFT_eSPI.h>      // Hardware-specific library