Don't reply with null island (#1605)

src/mesh/MeshService.cpp

@@ -168,7 +168,7 @@ void MeshService::sendNetworkPing(NodeNum dest, bool wantReplies)
     NodeInfo *node = nodeDB.getNode(nodeDB.getNodeNum());
     assert(node);
 
-    if (node->has_position) {
+    if (node->has_position && (node->position.latitude_i != 0 || node->position.longitude_i != 0)) {
         if (positionModule) {
             DEBUG_MSG("Sending position ping to 0x%x, wantReplies=%d\n", dest, wantReplies);
             positionModule->sendOurPosition(dest, wantReplies);

src/modules/PositionModule.cpp

@@ -103,6 +103,8 @@ MeshPacket *PositionModule::allocReply()
     } else
         DEBUG_MSG("Providing time to mesh %u\n", p.time);
 
+    DEBUG_MSG("Position reply: time=%i, latI=%i, lonI=-%i\n", p.time, p.latitude_i, p.longitude_i);
+
     return allocDataProtobuf(p);
 }
 
@@ -144,7 +146,6 @@ int32_t PositionModule::runOnce()
                 currentGeneration = radioGeneration;
 
                 DEBUG_MSG("Sending pos@%x:6 to mesh (wantReplies=%d)\n", node->position.pos_timestamp, requestReplies);
-
                 sendOurPosition(NODENUM_BROADCAST, requestReplies);
             }
         } else {