Set NULL after efree

Yasuo Ohgaki · Yasuo Ohgaki · commit 4c711200b40d · 2015-04-24T16:04:01.000+09:00
diff --git a/ext/session/mod_files.c b/ext/session/mod_files.c
@@ -325,6 +325,7 @@ PS_CLOSE_FUNC(files)
 
 	if (data->lastkey) {
 		efree(data->lastkey);
+		data->lastkey = NULL;
 	}
 
 	efree(data->basedir);
