Fixed syntax error with no-watch polling.
Fixed syntax error with no-watch polling.

Commit 2da3c24 introduced a syntax error that we failed to catch, so
this fixes it.

Signed-off-by: Jacob Howard <f862f167b85d41b225785c70d70808bc7337c1fe@havoc.io>

havoc-io/mutagen,havoc-io/mutagen