revert physics changes. They ain't right.

src/peds/Ped.cpp

@@ -1540,12 +1540,6 @@ CPed::UpdatePosition(void)
 			velocityChange = velocityChange * (changeMult / speedChange);
 		}
 	}
-	
-#ifdef FIX_BUGS
-	//helps with ped<->vehicle collisions and sprinting on steep grades at high framerates
-	velocityChange *= CTimer::GetTimeStepFix();
-#endif
-	
 	m_vecMoveSpeed.x += velocityChange.x;
 	m_vecMoveSpeed.y += velocityChange.y;
 }