Fix MSVC warning about int->bool conversion.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65167 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -713,7 +713,7 @@ bool wxWindowMSW::MSWEnableHWND(WXHWND hWnd, bool enable)
     if ( !enable && ::GetFocus() == hWnd )
         Navigate();
 
-    return ::EnableWindow(hWnd, (BOOL)enable);
+    return ::EnableWindow(hWnd, (BOOL)enable) != 0;
 }
 
 bool wxWindowMSW::Show(bool show)