[PATCH 0/1] MR11112: windows.ui.core.textinput/tests: Only check interfaces if retrieval succeeded.

[Bernhard Übelacker (＠bernhardu)]

This is an attempt to avoid the test crashing.

[Test pattern page windows.ui.core.textinput:textinput](https://test.winehq.org/data/patterns.html#windows.ui.core.textinput:textinp...)

[Testbot run with this patch](https://testbot.winehq.org/JobDetails.pl?Key=163330)

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https://gitlab.winehq.org/wine/wine/-/merge_requests/11112