[PATCH v3 0/3] MR11623: comctl32_v6: Avoid wrong return value for a single space in SYSLINK_Render.

[Bernhard Übelacker (＠bernhardu)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=59944

If a syslink control contains just a sinlge space currently unintialized values got returned in `SYSLINK_Render`.

~~Because this failure depends on memory initialization I did not split this patch.~~

[Testbot run with this patch](https://testbot.winehq.org/JobDetails.pl?Key=163972)

--
  v3: comctl32_v6: Fix SYSLINK_Render for a single space.
      comctl32_v6: Avoid uninitialized value for a single space in SYSLINK_Render.
      comctl32/tests: Add test for LM_GETIDEALSIZE for syslink with empty text.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/11623