fix: prevent null dereference in adjustTransformMtx when getContain() is null

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This PR addresses issue CLIENT-54P by adding a null check in W3DDependencyModelDraw::adjustTransformMtx.

Previously, the code would attempt to dereference the result of me->getContainedBy()->getContain() without verifying if getContain() returned a valid pointer. If the container object lacked a Contain module, getContain() would return null, leading to an EXCEPTION_ACCESS_VIOLATION_READ (0x0) when isEnclosingContainerFor(me) was called on the null pointer.

The fix introduces a null check for getContain() before its dereference, ensuring that isEnclosingContainerFor(me) is only called when a valid Contain module exists.

Fixes CLIENT-54P

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