Removing most of level 4 warnings, particulary in 16 bits mode

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3534 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/tooltip.cpp

@@ -41,6 +41,7 @@
 // ----------------------------------------------------------------------------
 
 // a simple wrapper around TOOLINFO Win32 structure
+#pragma warning( disable : 4097 )
 class wxToolInfo : public TOOLINFO
 {
 public:
@@ -58,6 +59,7 @@ public:
         uId = (UINT)win->GetHWND();
     }
 };
+#pragma warning( default : 4097 )
 
 // ----------------------------------------------------------------------------
 // private functions