Fix Clang warnings in bundled plugins

generic/attentionplugin/attentionplugin.cpp

@@ -274,7 +274,7 @@ bool AttentionPlugin::incomingStanza(int account, const QDomElement &stanza)
     return false;
 }
 
-bool AttentionPlugin::outgoingStanza(int /*account*/, QDomElement &xml)
+bool AttentionPlugin::outgoingStanza(int /*account*/, QDomElement & /*xml*/)
 {
     return false;
 }

generic/battleshipgameplugin/boardview.cpp

@@ -23,10 +23,10 @@
 
 BoardView::BoardView(QWidget *parent) : QTableView(parent), bmodel_(nullptr) { }
 
-void BoardView::setModel(BoardModel *model)
+void BoardView::setModel(QAbstractItemModel *model)
 {
     QTableView::setModel(model);
-    bmodel_ = model;
+    bmodel_ = qobject_cast<BoardModel *>(model);
 }
 
 void BoardView::resizeEvent(QResizeEvent * /*event*/) { setCellsSize(); }

generic/battleshipgameplugin/boardview.h

@@ -28,7 +28,7 @@ class BoardView : public QTableView {
     Q_OBJECT
 public:
     BoardView(QWidget *parent = nullptr);
-    void setModel(BoardModel *model);
+    void setModel(QAbstractItemModel *model) override;
 
 private:
     virtual void resizeEvent(QResizeEvent *event);

generic/battleshipgameplugin/gamesessions.cpp

@@ -378,7 +378,7 @@ void GameSession::appendInvitationEvent()
                        "showInvitationDialog");
 }
 
-void GameSession::showInvitationDialog(const QString &from, int account)
+void GameSession::showInvitationDialog(const QString & /*from*/, int /*account*/)
 {
     inviteDlg_ = new InvitationDialog(jid_, first_, boardWid_.data());
     connect(inviteDlg_.data(), SIGNAL(accepted()), this, SLOT(acceptInvitation()));

generic/chessplugin/chessplugin.cpp

@@ -728,7 +728,7 @@ bool ChessPlugin::incomingStanza(int account, const QDomElement &xml)
 
 bool ChessPlugin::outgoingStanza(int /*account*/, QDomElement & /*xml*/) { return false; }
 
-void ChessPlugin::doInviteDialog(const QString &jid, int account)
+void ChessPlugin::doInviteDialog(const QString &jid, int /*account*/)
 {
     if (!enabled || requests.isEmpty())
         return;