PathFinder - Fixed Howaner's bug

[SafwatHalaby]

Fixes this.

[madmaxoft]

I'd leave the assert at the top of the function, but check the a_Chunk instead. Or even better, pass the chunk as a reference, that can never be nullptr; then assign as m_Chunk = &a_Chunk

[SafwatHalaby]

Will do. Last time I tried this, there was a weird issue with Chunk references and the = operator. (But the ref might have been on the left hand, I'm not sure.)

[madmaxoft]

This looks good, merge if it compiles.

[SafwatHalaby]

Let me squash it first.

[SafwatHalaby]

OK to merge.