https://bugs.winehq.org/show_bug.cgi?id=36859
--- Comment #14 from panzerito el.panzerito@gmail.com --- wine-1.7.49$ diff dlls/kernel32/path.c dlls/kernel32/path.c.orig 336c336 < if (!lp || (tmplongpath[lp-1] != '\' && tmplongpath[lp-1] != '/')) ---
if (!lp || tmplongpath[lp-1] != '\\')
338,339c338,339 < /* strip double delimiters */ < tmplongpath[lp++] = shortpath[sp]; ---
/* strip double "\\" */ tmplongpath[lp++] = '\\';