[Bug 52926] New: usp10:usp10 The wgBlank and wgInvalid checks fail on Windows with the UTF-8 codepage

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52926

Bug ID: 52926
           Summary: usp10:usp10 The wgBlank and wgInvalid checks fail on
                    Windows with the UTF-8 codepage
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: usp10
          Assignee: [e-mail]
          Reporter: [e-mail]

usp10:usp10's wgBlank and wgInvalid checks in test_ScriptGetFontProperties()
fails on some truetype fonts with Hindi + UTF-8 codepage:

usp10.c:2634: Test failed: truetype font Symbol wgBlank 0000 gi[0] 0003
usp10.c:2645: Test failed: truetype font Symbol wgInvalid 0000 gi[0] 0003
usp10.c:2634: Test failed: truetype font Webdings wgBlank 0000 gi[0] 0003
usp10.c:2645: Test failed: truetype font Webdings wgInvalid 0000 gi[0] 0003
usp10.c:2634: Test failed: truetype font Wingdings wgBlank 0000 gi[0] 0003
usp10.c:2645: Test failed: truetype font Wingdings wgInvalid 0000 gi[0] 0003

https://test.winehq.org/data/patterns.html#usp10:usp10

See also bug 52925 which is a similar issue with wgBlank in a wider range of
locales, and for bitmap fonts instead of TrueType ones.