Fixed test failure in PositiveInteger.
Fixed test failure in PositiveInteger.

prashantpawar/supybot-rothbot,raboof/supybot,jeffmahoney/supybot,buildbot/supybot,mazaclub/mazabot-core,ProgVal/Limnoria-test,ProgVal/Limnoria-test,mazaclub/mazabot-core,kblin/supybot-gsoc,haxwithaxe/supybot,frumiousbandersnatch/supybot-code,Ban3/Limnoria,Ban3/Limnoria