Parallelized call to CastSeeRays in MovableMan::Update tries to read null pointer

[tjohnman]

Describe the bug
The parallelized loop that calls CastSeeRays on each of the m_Actors encountered a null pointer.
On inspection, none of the pointers in the deque are NULL. But due to it being parallelized, perhaps a NULL check should be done before trying to call the CastSeeRays method.

To Reproduce
This happened at the start of an attack in conquest mode without having first scanned the site.

Expected behavior
Game should not crash.

Additional context

Exception thrown at 0x00007FF759B73846 in Cortex Command.debug.release.exe: 0xC0000005: Access violation reading location 0x0000000000000000.

Call stack:

Cortex Command.debug.release.exe!RTE::MovableMan::Update::__l30::<lambda_2>::operator()(int start, int end) Line 1374	C++