add a function to check if a block is initialized

src/com/AircraftReporter.cpp

@@ -57,6 +57,10 @@ bool AircraftReporter::deinitialize() {
     return true;
 }
 
+bool AircraftReporter::initialized() const noexcept {
+    return nullptr != this->m_socket;
+}
+
 bool AircraftReporter::send(const aman::AircraftReport& report) {
     bool retval = false;