fixes #5816
mimes are now forced to spawn with the backpack, same as clowns
Merge pull request #5821 from Intigracy/onetimeIwokeupinthemiddleofthenightandcouldntgobacktosleepitwaslikesooooowierdandIwassooooootiredalldaylong

fixes #5816 (mimes not spawning with mime backpack if pref =/= backpack)