Fixes macOS compile error

Author: kdschlosser

ext_mod/lcd_bus/micropython.mk

@@ -32,6 +32,7 @@ else
     ifneq (,$(findstring macOS, $(LV_PORT)))
         # -F/Library/Frameworks -framework SDL2
         CFLAGS_USERMOD += -DMP_PORT_UNIX=1
+        CFLAGS_USERMOD += -Wno-incompatible-pointer-types-discards-qualifiers
         CFLAGS_USERMOD += -I/Library/Frameworks/SDL2.framework/Headers/SDL2
         CFLAGS_USERMOD += $(shell sdl2-config --cflags)
     	LDFLAGS_USERMOD += $(shell sdl2-config --libs)