From 670535baaf3cddf6a1de15d91d63df05ee5bb116 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Szabolcs=20Sz=C3=A9kelyi?= <cc@mail.3d.hu>
Date: Thu, 14 Feb 2019 03:46:28 -0500
Subject: [PATCH] Fix "discards qualifiers" compiler error (#253)

GCC wouldn't compile because NeoPixelBus::CanShow() is declared const but IsReadyToUpdate() is not:

    NeoPixelBus.h:161:40: error: passing 'const NeoEsp8266DmaMethodBase<NeoEsp8266DmaSpeedWs2812x>' as 'this' argument of 'bool NeoEsp8266DmaMethodBase<T_SPEED>::IsReadyToUpdate() [with T_SPEED = NeoEsp8266DmaSpeedWs2812x]' discards qualifiers [-fpermissive]

Making IsReadyToUpdate() const solves the issue.
---
 src/internal/NeoEsp8266DmaMethod.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/internal/NeoEsp8266DmaMethod.h b/src/internal/NeoEsp8266DmaMethod.h
index d6ab582..3dabcfd 100644
--- a/src/internal/NeoEsp8266DmaMethod.h
+++ b/src/internal/NeoEsp8266DmaMethod.h
@@ -168,7 +168,7 @@ public:
         free(_i2sBufDesc);
     }
 
-    bool IsReadyToUpdate() 
+    bool IsReadyToUpdate() const
     {
         return (_dmaState == NeoDmaState_Idle);
     }
@@ -444,4 +444,4 @@ typedef NeoEsp8266DmaSk6812Method NeoLc8812Method;
 typedef NeoEsp8266DmaWs2812xMethod Neo800KbpsMethod;
 typedef NeoEsp8266Dma400KbpsMethod Neo400KbpsMethod;
 
-#endif
\ No newline at end of file
+#endif