files-reg: Fix rm_parent_dirs() counter

Looks like it's a leftover from one of intermediate versions..
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

files-reg.c

@@ -1212,7 +1212,7 @@ static void rm_parent_dirs(int mntns_root, char *path, int count)
 {
 	char *p, *prev = NULL;
 
-	if (!count++)
+	if (!count)
 		return;
 
 	while (count--) {