fix issue where last ID data wasn't being reset when the VC was done with a call;

src/host/p25/Control.cpp

@@ -1540,6 +1540,11 @@ void Control::notifyCC_ReleaseGrant(uint32_t dstId)
     if (ret != network::rest::http::HTTPPayload::StatusType::OK) {
         ::LogError(LOG_P25, "failed to notify the CC %s:%u of the release of, dstId = %u", m_controlChData.address().c_str(), m_controlChData.port(), dstId);
     }
+
+    m_rfLastDstId = 0U;
+    m_rfLastSrcId = 0U;
+    m_netLastDstId = 0U;
+    m_netLastSrcId = 0U;
 }
 
 /// <summary>