Fixed crashes on signal emittion

This is caused by two bugs:
1) QMetaObject::activate first argument must be the return value
2) The next arguments should be void* to the actual datatype contained inside the QVariants
   and not QVariant*. In other words given "a" of type QVariant we should use a.constData()
   and not &a

lib/src/DosQObjectImpl.cpp

@@ -25,9 +25,9 @@ bool DosQObjectImpl::emitSignal(QObject *emitter, const QString &name, const std
 
     Q_ASSERT(name.toUtf8() == method.name());
 
-    std::vector<void *> arguments(args.size(), nullptr);
+    std::vector<void *> arguments(args.size() + 1, nullptr); // +1 for the result at pos 0
-    auto func = [](const QVariant & arg) -> void * { return (void *)(&arg); };
+    for (size_t i = 0; i < args.size(); ++i)
-    std::transform(args.begin(), args.end(), arguments.begin(), func);
+        arguments[i+1] = const_cast<void*>(args[i].constData()); // Extract inner void*
     QMetaObject::activate(emitter, method.methodIndex(), arguments.data());
     return true;
 }