added (inline) wxLocale::IsOk()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7830 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/intl.h

@@ -77,6 +77,9 @@ public:
         // restores old locale
     ~wxLocale();
 
+    // return TRUE if the locale was set successfully
+    bool IsOk() const { return m_pszOldLocale != NULL; }
+
     // returns locale name
     const wxChar *GetLocale() const { return m_strLocale; }