GPU Particles will not Rotate based on a negative Int Rotation Rate Value

GPU Particles will not rotate based on a negative input from a uniform distribution via Initial Rotation Rate

1. Add the attached P_RotRateTest.uasset to your content folder for QA Game
2. Open the QAGame Editor
3. Place the P_RotRateTest into the level

RESULTS: GPU Particle only rotates Clockwise or stands still, CPU Particles will rotate in both directions

EXPECTED: GPU Particles should have the same rotation behavior as CPU systems.