Fix stupid mistake in r1799.

git-svn-id: https://pennmush.googlecode.com/svn/trunk@1801 ba372814-4f39-11de-9ad6-1127a62b9fcd
Prevent filed mail from being retained when the recipient is nuked. Fixes issue 894.

git-svn-id: https://pennmush.googlecode.com/svn/trunk@1802 ba372814-4f39-11de-9ad6-1127a62b9fcd