don't use annoying and unneeded in C++ casts of NULL to "T *" in all other files neither

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/font.cpp

@@ -464,7 +464,7 @@ bool wxFont::GetNoAntiAliasing() const
 
 const wxNativeFontInfo *wxFont::GetNativeFontInfo() const
 {
-    wxCHECK_MSG( Ok(), (wxNativeFontInfo *)NULL, wxT("invalid font") );
+    wxCHECK_MSG( Ok(), NULL, wxT("invalid font") );
 
     return &(M_FONTDATA->m_nativeFontInfo);
 }