File mdbtools-null.patch of Package mdbtools

--- src/gmdb2/debug.c
+++ src/gmdb2/debug.c
@@ -485,7 +485,7 @@
 		(flags & MDB_IDX_REQUIRED) ? " Required" : "",
 		NULL);
 	if (strcmp(str, "Index Flags:") == 0) {
-		gchar *str2 = g_strconcat(str, " None");
+		gchar *str2 = g_strconcat(str, " None", NULL);
 		g_free(str);
 		str = str2;
 	}