Fixed Valgrind warnings

Running cockatrice in valgrind i didn't found any bad memory leak
(good!), but only a few jumps depending on uninitialized variables.
Even if the possibility of crashes are remote, it's nice to sort them
out.

cockatrice/src/gamesmodel.cpp

@@ -93,6 +93,7 @@ GamesProxyModel::GamesProxyModel(QObject *parent, ServerInfo_User *_ownUser)
     : QSortFilterProxyModel(parent),
           ownUser(_ownUser),
           unavailableGamesVisible(false),
+          passwordProtectedGamesVisible(false),
           maxPlayersFilterMin(-1),
           maxPlayersFilterMax(-1)
 {

cockatrice/src/messagelogwidget.cpp

@@ -876,6 +876,6 @@ void MessageLogWidget::connectToPlayer(Player *player)
 }
 
 MessageLogWidget::MessageLogWidget(const TabSupervisor *_tabSupervisor, TabGame *_game, QWidget *parent)
-    : ChatView(_tabSupervisor, _game, false, parent)
+    : ChatView(_tabSupervisor, _game, false, parent), currentContext(MessageContext_None)
 {
 }

cockatrice/src/phasestoolbar.cpp

@@ -100,7 +100,7 @@ void PhaseButton::triggerDoubleClickAction()
 }
 
 PhasesToolbar::PhasesToolbar(QGraphicsItem *parent)
-    : QGraphicsItem(parent), width(100), height(100)
+    : QGraphicsItem(parent), width(100), height(100), ySpacing(1), symbolSize(8)
 {
     QAction *aUntapAll = new QAction(this);
     connect(aUntapAll, SIGNAL(triggered()), this, SLOT(actUntapAll()));

cockatrice/src/tab_game.cpp

@@ -236,6 +236,7 @@ void DeckViewContainer::setDeck(const DeckLoader &deck)
 
 TabGame::TabGame(TabSupervisor *_tabSupervisor, GameReplay *_replay)
     : Tab(_tabSupervisor),
+    secondsElapsed(0),
     hostId(-1),
     localPlayerId(-1),
     spectator(true),

common/server_response_containers.cpp

@@ -15,7 +15,7 @@ GameEventStorageItem::~GameEventStorageItem()
 }
 
 GameEventStorage::GameEventStorage()
-    : gameEventContext(0)
+    : gameEventContext(0), privatePlayerId(0)
 {
 }