[PATCH 0/1] MR9334: comctl32/tests: Terminate string literal by double null character (ASan).

[Bernhard Übelacker (＠bernhardu)]

The TB_ADDSTRINGA expects the last string to be terminated by two null characters, to be able to detect the array end.

[ASan report details](https://gitlab.winehq.org/bernhardu/wine/-/blob/asan-pe_2025-10-18_wine-10.1...)