Fixed double-free of the window shape path

src/video/cocoa/SDL_cocoashape.m

@@ -92,7 +92,7 @@
 
     pool = [[NSAutoreleasePool alloc] init];
     closure.view = [windata->nswindow contentView];
-    closure.path = [[NSBezierPath bezierPath] autorelease];
+    closure.path = [[NSBezierPath bezierPath] init];
     closure.window = shaper->window;
     SDL_TraverseShapeTree(data->shape,&ConvertRects,&closure);
     [closure.path addClip];