Breakable Whips

The fact that whips were indestructible made them quite overpowered.

Still need to alter code so that chameleon/thievery whips can't use
their special abilities while broken.
No special effects for broken whips

Fixed whip of thievery effect code so that it can't steal items while
broken.

The code for the chameleon whip's code actually already included the
check for a broken weapon.