Set operating channel unconditionally

mobile/src/main/java/be/mygod/vpnhotspot/RepeaterService.kt

@@ -24,6 +24,7 @@ import be.mygod.vpnhotspot.net.wifi.WifiP2pManagerHelper.netId
 import be.mygod.vpnhotspot.net.wifi.WifiP2pManagerHelper.requestPersistentGroupInfo
 import be.mygod.vpnhotspot.net.wifi.WifiP2pManagerHelper.setWifiP2pChannels
 import be.mygod.vpnhotspot.net.wifi.WifiP2pManagerHelper.startWps
+import java.lang.reflect.InvocationTargetException
 import java.net.InetAddress
 import java.net.SocketException
 
@@ -150,11 +151,8 @@ class RepeaterService : Service(), WifiP2pManager.ChannelListener, VpnMonitor.Ca
 
     override fun onBind(intent: Intent) = binder
 
-    private fun setOperatingChannel(init: Boolean = false) {
-        val oc = app.operatingChannel
-        if (!init || oc > 0) {
+    private fun setOperatingChannel(oc: Int = app.operatingChannel) = try {
         // we don't care about listening channel
-            debugLog(TAG, "Setting OC to $oc")
         p2pManager.setWifiP2pChannels(channel, 0, oc, object : WifiP2pManager.ActionListener {
             override fun onSuccess() { }
             override fun onFailure(reason: Int) {
@@ -162,12 +160,15 @@ class RepeaterService : Service(), WifiP2pManager.ChannelListener, VpnMonitor.Ca
                         Toast.LENGTH_SHORT).show()
             }
         })
-        }
+    } catch (e: InvocationTargetException) {
+        if (oc != 0)
+            Toast.makeText(this, getString(R.string.repeater_set_oc_failure, e.message), Toast.LENGTH_SHORT).show()
+        e.printStackTrace()
     }
 
     override fun onChannelDisconnected() {
         channel = p2pManager.initialize(this, Looper.getMainLooper(), this)
-        setOperatingChannel(true)
+        setOperatingChannel()
         binder.requestGroupUpdate()
     }