simple_repeater: Include ongoing RX processing in hasPendingWork()

If the radio driver state machine is not in receive mode, this means
that processing of a packet is still in progress and we are not in an
idle state.

Signed-off-by: Frieder Schrempf <frieder@fris.de>

Author: fschrempf

examples/simple_repeater/MyMesh.cpp

@@ -1219,5 +1219,5 @@ void MyMesh::loop() {
 
 // To check if there is pending work
 bool MyMesh::hasPendingWork() const {
-  return _mgr->getOutboundCount(0xFFFFFFFF) > 0;
+  return (_mgr->getOutboundCount(0xFFFFFFFF) > 0) || !radio_driver.isInRecvMode();
 }