added explicit conversion of wxCStrData to const void * to resolve ambiguity between const char * and const unsigned char * conversion when passing s.c_str() to e.g. file output functions

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45024 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -798,6 +798,7 @@ public:
     const char* AsChar() const;
     const unsigned char* AsUnsignedChar() const
         { return (const unsigned char *) AsChar(); }
+    operator const void*() const { return AsChar(); }
     operator const char*() const { return AsChar(); }
     operator const unsigned char*() const { return AsUnsignedChar(); }
 #endif