Backport "Fix analyzer crash on 'StructuralValue'"

[steakhal]

This patch fixes 2 crashes (null-pointer dereferences), that are now hit after #78041.
Those crashes are tracked in issue #79575, and fix was already committed to llvm/main as ef67f63.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Balazs Benics (steakhal)

This patch fixes 2 crashes (null-pointer dereferences), that are now hit after #78041. Those crashes are tracked in issue #79575, and fix was already committed to llvm/main as ef67f63.

[llvmbot]

@llvm/issue-subscribers-clang-static-analyzer

Author: Balazs Benics (steakhal)

This patch fixes 2 crashes (null-pointer dereferences), that are now hit after #78041. Those crashes are tracked in issue #79575, and fix was already committed to llvm/main as ef67f63.

[steakhal]

/cherry-pick ef67f63

[llvmbot]

/pull-request #79997

[bolshakov-a]

Thank you!