Globally replace _T() with wxT().

Standardize on using a single macro across all wxWidgets sources and solve the name clash with Sun CC standard headers (see #10660).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/menu.cpp

@@ -652,7 +652,7 @@ void wxMenuItem::Check( bool check )
             break;
 
         default:
-            wxFAIL_MSG( _T("can't check this item") );
+            wxFAIL_MSG( wxT("can't check this item") );
     }
 }