camerad: don't crash zmq if get interrupt from msgq (#1790)

* not crash zmq if get interrupt from msgq

* also filter eagain

selfdrive/camerad/cameras/camera_qcom.cc

@@ -2028,8 +2028,7 @@ static void* ops_thread(void* arg) {
         assert(err == 0);
 
         err = zmq_msg_recv(&msg, sockraw, 0);
-        assert(err >= 0);
-
+        if (err >= 0) {
           CameraMsg cmsg;
           if (zmq_msg_size(&msg) == sizeof(cmsg)) {
             memcpy(&cmsg, zmq_msg_data(&msg), zmq_msg_size(&msg));
@@ -2047,6 +2046,11 @@ static void* ops_thread(void* arg) {
               break;
             }
           }
+        } else {
+          // skip if zmq is interrupted by msgq
+          int err_no = zmq_errno();
+          assert(err_no == EINTR || err_no == EAGAIN);
+        }
 
         zmq_msg_close(&msg);
       }