kernel32: properly strip double path delimiters in GetShortPathName

[Peter Beutner]

The existing code doesn't handle the case when a double path delimiter
follows after a leading dot.

Fixes https://bugs.winehq.org/show_bug.cgi?id=41002

Signed-off-by: Peter Beutner <p.beutner at gmx.net>
---
 dlls/kernel32/path.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/kernel32/path.c b/dlls/kernel32/path.c
index 620401d..0c9a2ad 100644
--- a/dlls/kernel32/path.c
+++ b/dlls/kernel32/path.c
@@ -515,6 +515,8 @@ DWORD WINAPI GetShortPathNameW( LPCWSTR longpath, LPWSTR shortpath, DWORD shortl
             tmpshortpath[sp++] = *p++;
             tmpshortpath[sp++] = *p++;
             lp += 2;
+            /* strip double delimiters */
+            while (*p == '/' || *p == '\\') p++;
         }
         for (; *p && *p != '/' && *p != '\\'; p++);
         tmplen = p - (longpath + lp);
-- 
2.7.3