visionstream: fix doube fd close (#2057)

* s->ipc_fd counld be closed twice

* white space

selfdrive/common/visionipc.c

@@ -90,6 +90,7 @@ int visionstream_init(VisionStream *s, VisionStreamType type, bool tbuffer, Visi
   err = vipc_send(s->ipc_fd, &p);
   if (err < 0) {
     close(s->ipc_fd);
+    s->ipc_fd = -1;
     return -1;
   }
 
@@ -97,6 +98,7 @@ int visionstream_init(VisionStream *s, VisionStreamType type, bool tbuffer, Visi
   err = vipc_recv(s->ipc_fd, &rp);
   if (err <= 0) {
     close(s->ipc_fd);
+    s->ipc_fd = -1;
     return -1;
   }
   assert(rp.type == VIPC_STREAM_BUFS);
@@ -190,5 +192,5 @@ void visionstream_destroy(VisionStream *s) {
     }
   }
   if (s->bufs) free(s->bufs);
-  close(s->ipc_fd);
+  if (s->ipc_fd >= 0) close(s->ipc_fd);
 }