lua_intf: fix memleak.

modules/misc/lua/intf.c

@@ -151,7 +151,7 @@ int Open_LuaIntf( vlc_object_t *p_this )
 
     config_ChainParse( p_intf, "lua-", ppsz_intf_options, p_intf->p_cfg );
     char *psz_name = GetModuleName( p_intf );
-    const char *psz_config;
+    char *psz_config;
     bool b_config_set = false;
     if( !psz_name ) psz_name = strdup( "dummy" );
 
@@ -261,6 +261,8 @@ int Open_LuaIntf( vlc_object_t *p_this )
             }
         }
     }
+    free( psz_config );
+
     if( b_config_set == false )
     {
         lua_newtable( L );