SDL_cocoawindow.m: work-around build error due to -Wgnu-folding-constant

src/video/cocoa/SDL_cocoawindow.m

@@ -2236,7 +2236,7 @@ int Cocoa_SetWindowGammaRamp(_THIS, SDL_Window * window, const Uint16 * ramp)
 {
     SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
     CGDirectDisplayID display_id = ((SDL_DisplayData *)display->driverdata)->display;
-    const uint32_t tableSize = 256;
+    #define tableSize 256
     CGGammaValue redTable[tableSize];
     CGGammaValue greenTable[tableSize];
     CGGammaValue blueTable[tableSize];
@@ -2255,6 +2255,7 @@ int Cocoa_SetWindowGammaRamp(_THIS, SDL_Window * window, const Uint16 * ramp)
         return SDL_SetError("CGSetDisplayTransferByTable()");
     }
     return 0;
+    #undef tableSize
 }}
 
 void *Cocoa_GetWindowICCProfile(_THIS, SDL_Window * window, size_t * size)
@@ -2335,7 +2336,7 @@ int Cocoa_GetWindowGammaRamp(_THIS, SDL_Window * window, Uint16 * ramp)
 {
     SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
     CGDirectDisplayID display_id = ((SDL_DisplayData *)display->driverdata)->display;
-    const uint32_t tableSize = 256;
+    #define tableSize 256
     CGGammaValue redTable[tableSize];
     CGGammaValue greenTable[tableSize];
     CGGammaValue blueTable[tableSize];
@@ -2352,6 +2353,7 @@ int Cocoa_GetWindowGammaRamp(_THIS, SDL_Window * window, Uint16 * ramp)
         ramp[2*256+i] = (Uint16)(blueTable[i] * 65535.0f);
     }
     return 0;
+    #undef tableSize
 }
 
 void Cocoa_SetWindowMouseRect(_THIS, SDL_Window * window)