Pet - casting new pet while having one

Normally you can start casting a new pet while stil having one. if you don't release it during the cast time you'll get a message in the end.
if you do release it during the casttime, you'll cast the new pet.

right now you get a message: "You already have a charmed creature, release it first!"

this message can only be correct for classes that can charm (mistrels, sorcs, sm's etc)