moc generated codes trigger `-Werror=unsafe-buffer-usage` warning/error

MOC auto-generated codes don't play nice with Clang's `-Wunsafe-buffer-usage` / `-Werror=unsafe-buffer-usage`.

this is the header:

```cpp
#include <QWindow>

class VulkanWindow : public QWindow
{
Q_OBJECT
public:
VulkanWindow(QWindow *parent = nullptr)
: QWindow(parent)
{}

void closeEvent(QCloseEvent *event) override

{ emit windowClosed(); QWindow::closeEvent(event); }

signals:
void windowClosed();
};
```

This is the compile time error:

In file included from project/build/Desktop_Qt_6_7_2-Debug/main_autogen/mocs_compilation.cpp:2:
project/build/Desktop_Qt_6_7_2-Debug/main_autogen/UVLADIE3JM/moc_vulkanwindow.cpp:84:90: error: '_a' is an unsafe pointer used for buffer access [-Werror,-Wunsafe-buffer-usage]
84 | void VulkanWindow::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)

~~~~~~^ project/build/Desktop_Qt_6_7_2-Debug/main_autogen/UVLADIE3JM/moc_vulkanwindow.cpp:97:85: note: used in buffer access here 97	if (_t _q_method = &VulkanWindow::windowClosed; *reinterpret_cast<_t *>(_a[1]) == _q_method) {
^~ 1 error generated.

(yeah i can't figure out how to properly format. why is markdown not supported?)