libwine: vsnprintfW should support Microsoft-specific prefixes for strings

[Andrey Turkin]

Native vsnprintf support such specifiers as %ls or %hs or %S. Wine implementation was ignoring width specifiers for
strings until commit 9428dfe71a83c175108b8a936db5768f5d6558c8 (libwine: Fix vsnprintfW string formatting to handle
alignment and padding), which caused regression for "%ls" format string. This patch add support for Microsoft-specific
width specifiers and type specifiers %S and %C.
---
 libs/wine/string.c |   37 ++++++++++++++++++++++++-------------
 1 files changed, 24 insertions(+), 13 deletions(-)


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