[clang] Fix for false positive issue (PR #155131)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

Thanks for working on this :slightly_smiling_face: !

Is your code ready for a first round of review, or are you still planning significant changes?

By the way, please change the title of this PR to e.g. "Fix unique_ptr aggregate initialization false positives" or something similar that makes it somewhat recognizable. I see that it's difficult to give a short title to this particular change (and long titles should be avoided), but "Fix for false positive issue" is so generic that it would be suitable for at least a third of all analyzer commits.

https://github.com/llvm/llvm-project/pull/155131