gfx: #undef quad

Surprisingly, esp-idf #includes files such as sys/types.h when pulling
other standard header files, even when not explicitly defined. While
this is not a serious issue, incredibly their sys/types.h implementation
uses "#define quad", therefore breaking user code such as anything
related to "struct quad".

src/gfx/esp32/inc/gfx/port.h

@@ -3,6 +3,8 @@
 
 #include <stdbool.h>
 
+#undef quad
+
 #ifdef __cplusplus
 extern "C"
 {

src/gfx/esp32/src/quad.c

@@ -4,6 +4,8 @@
 #include <stddef.h>
 #include <stdlib.h>
 
+#undef quad
+
 int quad_from_sprite(const struct sprite *const s, struct quad *const q)
 {
     return -1;

src/gfx/inc/gfx.h

@@ -1,9 +1,9 @@
 #ifndef GFX_H
 #define GFX_H
 
-#include <gfx/port.h>
 #include <stdbool.h>
 #include <stdio.h>
+#include <gfx/port.h>
 
 #ifdef __cplusplus
 extern "C"