Fix Mac build, patch #1091 by Humberto Diogenes.
diff --git a/Mac/scripts/cachersrc.py b/Mac/scripts/cachersrc.py
index e2eed8b..e0e8415 100644
--- a/Mac/scripts/cachersrc.py
+++ b/Mac/scripts/cachersrc.py
@@ -12,7 +12,8 @@
 class NoArgsError(Exception):
     pass
 
-def handler((verbose, force), dirname, fnames):
+def handler(arg1, dirname, fnames):
+    verbose, force = arg1
     for fn in fnames:
         if fn[-5:] == '.rsrc' and fn[-13:] != '.rsrc.df.rsrc':
             if force: