fix autobug NPE

app/src/main/java/com/geeksville/mesh/MainActivity.kt

@@ -659,30 +659,32 @@ class MainActivity : AppCompatActivity(), Logging,
 
                 debug("Getting latest radioconfig from service")
                 try {
-                    val info = service.myNodeInfo
+                    val info: MyNodeInfo? = service.myNodeInfo // this can be null
                     model.myNodeInfo.value = info
 
-                    val isOld = info.minAppVersion > BuildConfig.VERSION_CODE
-                    if (isOld)
-                        showAlert(R.string.app_too_old, R.string.must_update)
-                    else {
-
-                        val curVer = DeviceVersion(info.firmwareVersion ?: "0.0.0")
-                        if (curVer < MeshService.minFirmwareVersion)
-                            showAlert(R.string.firmware_too_old, R.string.firmware_old)
+                    if (info != null) {
+                        val isOld = info.minAppVersion > BuildConfig.VERSION_CODE
+                        if (isOld)
+                            showAlert(R.string.app_too_old, R.string.must_update)
                         else {
-                            // If our app is too old/new, we probably don't understand the new radioconfig messages, so we don't read them until here
 
-                            model.radioConfig.value =
-                                RadioConfigProtos.RadioConfig.parseFrom(service.radioConfig)
+                            val curVer = DeviceVersion(info.firmwareVersion ?: "0.0.0")
+                            if (curVer < MeshService.minFirmwareVersion)
+                                showAlert(R.string.firmware_too_old, R.string.firmware_old)
+                            else {
+                                // If our app is too old/new, we probably don't understand the new radioconfig messages, so we don't read them until here
 
-                            model.channels.value =
-                                ChannelSet(AppOnlyProtos.ChannelSet.parseFrom(service.channels))
+                                model.radioConfig.value =
+                                    RadioConfigProtos.RadioConfig.parseFrom(service.radioConfig)
 
-                            updateNodesFromDevice()
+                                model.channels.value =
+                                    ChannelSet(AppOnlyProtos.ChannelSet.parseFrom(service.channels))
 
-                            // we have a connection to our device now, do the channel change
-                            perhapsChangeChannel()
+                                updateNodesFromDevice()
+
+                                // we have a connection to our device now, do the channel change
+                                perhapsChangeChannel()
+                            }
                         }
                     }
                 } catch (ex: RemoteException) {
@@ -968,12 +970,11 @@ class MainActivity : AppCompatActivity(), Logging,
 
         try {
             bindMeshService()
-        }
-        catch(ex: BindFailedException) {
+        } catch (ex: BindFailedException) {
             // App is probably shutting down, ignore
             errormsg("Bind of MeshService failed")
         }
-        
+
         val bonded = RadioInterfaceService.getBondedDeviceAddress(this) != null
         if (!bonded && usbDevice == null) // we will handle USB later
             showSettingsPage()
@@ -1100,7 +1101,7 @@ class MainActivity : AppCompatActivity(), Logging,
                                     positionToMeter(my_position!!, position).roundToInt()
                                 fs.write(
                                     ("${packet_proto.from.toUInt().toString(16)}," +
-                                            "${packet_proto.rxSnr},${packet_proto.rxTime},$dist\n")
+                                        "${packet_proto.rxSnr},${packet_proto.rxTime},$dist\n")
                                         .toByteArray()
                                 )
                             }