Fix compilation (see #5313)
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index d5af3e4..c2f5d64 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -1379,6 +1379,7 @@ GLES2_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture)
type = GL_UNSIGNED_BYTE;
break;
#endif
+#ifdef GL_TEXTURE_EXTERNAL_OES
case SDL_PIXELFORMAT_EXTERNAL_OES:
format = GL_NONE;
type = GL_NONE;
@@ -2142,6 +2143,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_NV12;
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_NV21;
#endif
+#ifdef GL_TEXTURE_EXTERNAL_OES
renderer->info.texture_formats[renderer->info.num_texture_formats++] = SDL_PIXELFORMAT_EXTERNAL_OES;
#endif