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/common/intl.cpp

@@ -2200,7 +2200,7 @@ wxString wxLocale::GetSystemEncodingName()
         // the environment variables (in most cases this won't work, but I was
         // out of ideas)
         char *lang = getenv( "LC_ALL");
-        char *dot = lang ? strchr(lang, '.') : (char *)NULL;
+        char *dot = lang ? strchr(lang, '.') : NULL;
         if (!dot)
         {
             lang = getenv( "LC_CTYPE" );