Changed Z_virus stage_act logic to prevent processing of disease stages if the user is already a zombie. Hopefully resolves massive lag caused by zombies.
Changed Z_virus stage_act logic to prevent processing of disease stages if the user is already a zombie. Hopefully resolves massive lag caused by zombies.

LLA-Gaming/Ice-Station,LLA-Gaming/SS13,ohpistolpete/ColdSauce,LLA-Gaming/Ice-Station,LLA-Gaming/Ice-Station,ohpistolpete/ColdSauce,LLA-Gaming/Ice-Station,ohpistolpete/ColdSauce,LLA-Gaming/SS13,LLA-Gaming/SS13,LLA-Gaming/SS13,ohpistolpete/ColdSauce