proper braces avoiding potential dangling else resulting from expansion

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71737 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/glcanvas.mm

@@ -39,7 +39,9 @@ WXGLContext WXGLCreateContext( WXGLPixelFormat pixelFormat, WXGLContext shareCon
 {
     WXGLContext context = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext: shareContext];
     if ( !context )
+    {
         wxFAIL_MSG("NSOpenGLContext creation failed");
+    }
     return context ;
 }