Reversed test to be easier to read, more efficient, and match other code

src/video/cocoa/SDL_cocoawindow.m

@@ -2210,7 +2210,7 @@ void Cocoa_SetWindowSize(SDL_VideoDevice *_this, SDL_Window *window)
         }
 
         /* isZoomed always returns true if the window is not resizable */
-        if (!Cocoa_IsZoomed(window) || !(window->flags & SDL_WINDOW_RESIZABLE)) {
+        if (!(window->flags & SDL_WINDOW_RESIZABLE) || !Cocoa_IsZoomed(window)) {
             if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
                 [nswindow setFrame:[nswindow frameRectForContentRect:rect] display:YES];
                 ScheduleContextUpdates(windata);