* Fix Slateport Battle Tent/Battle Factory
Stops the Battle Factory and Slateport Battle Tent from returning no Pokémon when player wants to swap their Pokémon.
* Fix player rental party being junk data after rest
Fixes#5280
* Consolidate checks into single method
Consolidates every gSpecialVar_0x8005 check into a singular method.
Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include *.s --include *.inc --include *.txt * | xargs sed -i 's/\s\+$//g'
Credits to Grant Murphy from Stack Overflow.
