Minor Fixes!

Fixed Melee "freezing" during avoidance movements.
LOS Movement for Special Objects is no longer conducted prior to
engaging the unit.
Safe Spot finding for ranged classes will use AllowWalk when checking
LOS.
Reduced Collision Value for Wall Affixes by dividing it by 2.5f.
Validation for units with health percent over 100% (Gorsque Exploding
Guys) are now ignored.
IsNPC added as property value into CacheUnit, and is no longer updated
every loop.
Removed the unnecessary slow time ability logic for OOC.
Increased Cluster Distance for WOTB range from 35f to 45f.