Test qtop breaking when series ends with guarded patches.

tests/test-mq-guards

@@ -54,6 +54,8 b' hg qguard c.patch'
 
 echo % should skip c.patch
 hg qpush -a
+echo % should display b.patch
+hg qtop
 
 hg qguard -n c.patch
 echo % should push c.patch

tests/test-mq-guards.out

@@ -25,6 +25,8 b' c.patch: -a'
 applying b.patch
 skipping c.patch - guarded by '-a'
 Now at: b.patch
+% should display b.patch
+b.patch
 % should push c.patch
 applying c.patch
 Now at: c.patch