don't crash when jason tries to use tomahawk

src/web/api_v1.cpp

@@ -180,7 +180,7 @@ Api_v1::send404( QxtWebRequestEvent* event )
     qDebug() << "404" << event->url.toString();
     QxtWebPageEvent* wpe = new QxtWebPageEvent( event->sessionID, event->requestID, "<h1>Not Found</h1>" );
     wpe->status = 404;
-    wpe->statusMessage = "not feventound";
+    wpe->statusMessage = "no event found";
     postEvent( wpe );
 }
 

thirdparty/qxt/qxtweb-standalone/qxtweb/qxthttpsessionmanager.cpp

@@ -682,6 +682,9 @@ void QxtHttpSessionManager::sendNextBlock(int requestID)
 {
     QSharedPointer<QIODevice>& dataSource = connector()->getRequestDataSource( requestID );
     QIODevice* device = connector()->getRequestConnection(requestID);
+    if (!device)
+        return;
+
     if (!qxt_d().connectionState.contains(device)) return;  // in case a disconnect signal and a bytesWritten signal get fired in the wrong order
     QxtHttpSessionManagerPrivate::ConnectionState& state = qxt_d().connectionState[device];
     if (state.finishedTransfer) return;

thirdparty/qxt/qxtweb-standalone/qxtweb/qxtmetaobject.cpp

@@ -323,6 +323,11 @@ namespace QxtMetaObject
      */
     bool connect(QObject* sender, const char* signal, QxtBoundFunction* slot, Qt::ConnectionType type)
     {
+        if (!sender)
+        {
+            qWarning() << "Got connect() with a null sender!";
+            return false;
+        }
         const QMetaObject* meta = sender->metaObject();
         int methodID = meta->indexOfMethod(meta->normalizedSignature(signal).mid(1).constData());
         if (methodID < 0)