define NIN_BALLOONXXX constants if the SDK doesn't

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50420 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/taskbar.cpp

@@ -32,6 +32,11 @@
 #include "wx/taskbar.h"
 #include "wx/dynlib.h"
 
+#ifndef NIN_BALLOONTIMEOUT
+    #define NIN_BALLOONTIMEOUT      0x0404
+    #define NIN_BALLOONUSERCLICK    0x0405
+#endif
+
 // initialized on demand
 static UINT gs_msgTaskbar = 0;
 static UINT gs_msgRestartTaskbar = 0;