Make dbh:connected accessible from Lua - thanks Grmt

src/mod/languages/mod_lua/freeswitch_lua.h

@@ -55,12 +55,13 @@ namespace LUA {
   class Dbh {
     protected:
       switch_cache_db_handle_t *dbh;
-      bool connected;
+      bool m_connected;
       static int query_callback(void *pArg, int argc, char **argv, char **cargv);
     public:
       Dbh(char *dsn, char *user = NULL, char *pass = NULL);
       ~Dbh();
       bool release();
+      bool connected();
       bool query(char *sql, SWIGLUA_FN lua_fun);
   };
 }