[Qemu-trivial] [PATCH] block: Fix regression for MinGW (assertion caused by short string)

[Stefan Weil]

The local string tmp_filename is passed to function get_tmp_filename
which expects a string with minimum size MAX_PATH for w32 hosts.

MAX_PATH is 260 and PATH_MAX is 259, so tmp_filename was too short.

Commit eba25057b9a5e19d10ace2bc7716667a31297169 introduced this
regression.

Signed-off-by: Stefan Weil <address@hidden>
---
 block.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 49dd6bb..8739635 100644
--- a/block.c
+++ b/block.c
@@ -787,7 +787,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, 
int flags,
               BlockDriver *drv)
 {
     int ret;
-    char tmp_filename[PATH_MAX];
+    char tmp_filename[PATH_MAX + 1];
 
     if (flags & BDRV_O_SNAPSHOT) {
         BlockDriverState *bs1;
-- 
1.7.10.4