iOS: Fix unintentional fall-through

Amends 907c0a1401

Change-Id: Ie58b6cfeaba83bcc0236e0aad594f9ac8042e1b2
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/ios/iostoolhandler.cpp

@@ -467,6 +467,7 @@ void IosDeviceToolHandlerPrivate::processXml()
                 break;
             case ParserState::Error:
                 errorMsg(p.chars);
+                break;
             case ParserState::DeviceId:
                 if (m_deviceId.isEmpty())
                     m_deviceId = p.chars;