Merge branch 'getcwd-fix-case'

This makes sure that Git's idea of the current working directory matches
what is recorded on disk (which should be the same as Git's idea).

This helps in particular PowerShell users where the current working
directory can differ in case from what's stored on disk.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

compat/mingw.c

@@ -921,8 +921,13 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 char *mingw_getcwd(char *pointer, int len)
 {
 	int i;
-	wchar_t wpointer[MAX_PATH];
-	if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
+	wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
+	DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
+
+	if (ret < 0 || ret >= ARRAY_SIZE(cwd))
+		return NULL;
+	ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
+	if (!ret || ret >= ARRAY_SIZE(wpointer))
 		return NULL;
 	if (xwcstoutf(pointer, wpointer, len) < 0)
 		return NULL;