[m-rev.] for post-commit review: fix mantis bug 437

[Zoltan Somogyi]

For post-commit review by Peter, since he reported the bug.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Log.bug437
Type: application/octet-stream
Size: 427 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20170805/1579e901/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.bug437
Type: application/octet-stream
Size: 10121 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20170805/1579e901/attachment-0001.obj>