Warning fixes to unused variables, int/wxChar keycode and other typecasting, not mixing 'type*' and 'type' variables in single line, IsEmpty to empty replacement etc.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30305 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -4551,7 +4551,7 @@ wxKeyEvent wxWindowMSW::CreateKeyEvent(wxEventType evType,
     event.m_eventObject = (wxWindow *)this; // const_cast
     event.m_keyCode = id;
 #if wxUSE_UNICODE
-    event.m_uniChar = wParam;
+    event.m_uniChar = (wxChar) wParam;
 #endif
     event.m_rawCode = (wxUint32) wParam;
     event.m_rawFlags = (wxUint32) lParam;