Use mode_t as parameter type in mkdir_with_parents

The parameter mode only usage is it being passed to ensure_dir(), which
takes it as mode_t.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>

utils.c

@@ -672,7 +672,7 @@ ensure_dir (const char *path,
 /* Sets errno on error (!= 0) */
 int
 mkdir_with_parents (const char *pathname,
-                    int         mode,
+                    mode_t      mode,
                     bool        create_last)
 {
   cleanup_free char *fn = NULL;

utils.h

@@ -115,7 +115,7 @@ int   ensure_dir (const char *path,
                   mode_t      mode);
 int   get_file_mode (const char *pathname);
 int   mkdir_with_parents (const char *pathname,
-                          int         mode,
+                          mode_t      mode,
                           bool        create_last);
 void create_pid_socketpair (int sockets[2]);
 void send_pid_on_socket (int socket);