posix_w32: prevent segfaulting on Windows when building a temporary filename
diff --git a/src/win32/posix_w32.c b/src/win32/posix_w32.c
index e406a8f..0001654 100644
--- a/src/win32/posix_w32.c
+++ b/src/win32/posix_w32.c
@@ -365,7 +365,7 @@ extern int p_creat(const char *path, mode_t mode);
int p_mkstemp(char *tmp_path)
{
#if defined(_MSC_VER)
- if (_mktemp_s(tmp_path, GIT_PATH_MAX) != 0)
+ if (_mktemp_s(tmp_path, strlen(tmp_path) + 1) != 0)
return GIT_EOSERR;
#else
if (_mktemp(tmp_path) == NULL)