offscreen: Define missing define on a older EGL for an EXT function which it wont have
diff --git a/src/video/SDL_egl.c b/src/video/SDL_egl.c
index f0858f3..98bb400 100644
--- a/src/video/SDL_egl.c
+++ b/src/video/SDL_egl.c
@@ -82,6 +82,13 @@
#define DEFAULT_OGL_ES "libGLESv1_CM.so.1"
#endif /* SDL_VIDEO_DRIVER_RPI */
+/** If we happen to not have this defined because of an older EGL version, just define it 0x0
+ as eglGetPlatformDisplayEXT will most likely be NULL if this is missing
+*/
+#ifndef EGL_PLATFORM_DEVICE_EXT
+#define EGL_PLATFORM_DEVICE_EXT 0x0
+#endif
+
#ifdef SDL_VIDEO_STATIC_ANGLE
#define LOAD_FUNC(NAME) \
_this->egl_data->NAME = (void *)NAME;