Mac: Fix cast warning.
diff --git a/src/video/cocoa/SDL_cocoaopengl.m b/src/video/cocoa/SDL_cocoaopengl.m
index 0d49ba0..33d5393 100644
--- a/src/video/cocoa/SDL_cocoaopengl.m
+++ b/src/video/cocoa/SDL_cocoaopengl.m
@@ -344,7 +344,7 @@ Cocoa_GL_SwapWindow(_THIS, SDL_Window * window)
pool = [[NSAutoreleasePool alloc] init];
- SDLOpenGLContext* nscontext = (NSOpenGLContext*)SDL_GL_GetCurrentContext();
+ SDLOpenGLContext* nscontext = (SDLOpenGLContext*)SDL_GL_GetCurrentContext();
[nscontext flushBuffer];
[nscontext updateIfNeeded];