ensure \0 at the end of channel mutex name

src/ngx_http_push_stream_module_setup.c

@@ -1121,7 +1121,7 @@ ngx_http_push_stream_init_shm_zone(ngx_shm_zone_t *shm_zone, void *data)
 
     u_char lock_name[25];
     for (i = 0; i < 10; i++) {
-        ngx_sprintf(lock_name, "push_stream_channels_%d", i);
+        ngx_sprintf(lock_name, "push_stream_channels_%d%Z", i);
         if (ngx_http_push_stream_create_shmtx(&d->channels_mutex[i], &d->channels_lock[i], lock_name) != NGX_OK) {
             return NGX_ERROR;
         }