Explicitly check for is non for the criteria pattern.
Explicitly check for is non for the criteria pattern.

If we don't do that, comparisons are broken for all the falsy values
(e.g. integer 0, boolean false, etc.).

StackStorm/st2,punalpatel/st2,emedvedev/st2,peak6/st2,tonybaloney/st2,pixelrebel/st2,punalpatel/st2,nzlosh/st2,Plexxi/st2,tonybaloney/st2,StackStorm/st2,lakshmi-kannan/st2,nzlosh/st2,peak6/st2,nzlosh/st2,tonybaloney/st2,lakshmi-kannan/st2,emedvedev/st2,emedvedev/st2,lakshmi-kannan/st2,pixelrebel/st2,Plexxi/st2,StackStorm/st2,StackStorm/st2,pixelrebel/st2,nzlosh/st2,peak6/st2,Plexxi/st2,Plexxi/st2,punalpatel/st2