From 84b919a2a794c1526cde5fb512ee525d9eae69df Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Thu, 20 Mar 2014 11:22:57 -0400
Subject: [PATCH] Static analysis fix: dereference of a NULL pointer.

---
 src/video/cocoa/SDL_cocoawindow.m | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/video/cocoa/SDL_cocoawindow.m b/src/video/cocoa/SDL_cocoawindow.m
index a55ab4967..9e6edbb76 100644
--- a/src/video/cocoa/SDL_cocoawindow.m
+++ b/src/video/cocoa/SDL_cocoawindow.m
@@ -1464,9 +1464,7 @@ Cocoa_SetWindowGrab(_THIS, SDL_Window * window, SDL_bool grabbed)
         CGDisplayMoveCursorToPoint(kCGDirectMainDisplay, cgpoint);
     }
 
-    if ( window->flags & SDL_WINDOW_FULLSCREEN ) {
-        SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
-
+    if ( data && (window->flags & SDL_WINDOW_FULLSCREEN) ) {
         if (SDL_ShouldAllowTopmost() && (window->flags & SDL_WINDOW_INPUT_FOCUS)) {
             /* OpenGL is rendering to the window, so make it visible! */
             [data->nswindow setLevel:CGShieldingWindowLevel()];