Fix drawparticlesys over flow.
Fix drawparticlesys over flow.

Plutonium

Signed-off-by: PlutoniumHeart <62d8b3d396df4a30733f5e610953cfac1753bcba@gmail.com>

GPUWorks/freefalcon-central,FreeFalcon/freefalcon-central,as02700/freefalcon-central,as02700/freefalcon-central,FreeFalcon/freefalcon-central,GPUWorks/freefalcon-central