Improve CT bots awareness when losing a hostage

I noticed when a bot think a hostage is following him, the hostage might actually get lost or stand still etc. Now bots only re-evaluate this when they arrive at their goal or are forced to rethink their goal because of encountering an enemy etc.

This could be a bit smarter. Bot could for instance re-evaluate this every 5 seconds orso and then decide to go back or not.