[CRIU] [PATCH] files: Fix compilation errors

[Pavel Begunkov]

1: Signed underflow
criu/files-reg.c: In function ‘open_path’:
criu/files-reg.c:1299:14: error: iteration 2147483647
invokes undefined behavior [-Werror=aggressive-loop-optimizations]
  while (count--) {
         ~~~~~^~

2: Uninitialized variable
criu/files-reg.c: In function ‘make_parent_dirs_if_need’:
criu/files-reg.c:1354:13: warning: ‘count’ may be used uninitialized in
  this function [-Wmaybe-uninitialized]

P.S. arch linux 4.7.5-1. gcc (GCC) 6.3.1 20170109

Signed-off-by: Pavel Begunkov <asml.silence at gmail.com>
---
 criu/files-reg.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/criu/files-reg.c b/criu/files-reg.c
index 7c81d182..dfc3f29a 100644
--- a/criu/files-reg.c
+++ b/criu/files-reg.c
@@ -1296,7 +1296,8 @@ static void rm_parent_dirs(int mntns_root, char *path, int count)
 	if (!count)
 		return;
 
-	while (count--) {
+	while (count > 0) {
+		count -= 1;
 		p = strrchr(path, '/');
 		if (p)
 			*p = '\0';
@@ -1431,7 +1432,7 @@ out_root:
 int open_path(struct file_desc *d,
 		int(*open_cb)(int mntns_root, struct reg_file_info *, void *), void *arg)
 {
-	int tmp, mntns_root, level;
+	int tmp, mntns_root, level = 0;
 	struct reg_file_info *rfi;
 	char *orig_path = NULL;
 	char path[PATH_MAX];
-- 
2.11.1