Merge pull request #1228 from Cobrand/PR1227-fix

Fix build for macOS (fix for PR 1227)

Author: Cobrand

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "sdl2-sys/SDL"]
 	path = sdl2-sys/SDL
-	url = https://github.com/libsdl-org/SDL
+	url = https://github.com/Cobrand/SDL #temporary fork used for issue #1227, use the official repo when possible