QMetaType: use sized delete to deallocate a value

When destroying a value created by QMetaType::create(), pass the size
to operator delete. This allows allocators to potentially optimize the
deallocation.

The size passed is always the one used during allocation, iface->size.

As a drive-by, make the operator() function const.

Change-Id: I3224af525671d98327d21033d059f52620fbb837
Reviewed-by: Thiago Macieira <[email protected]>

Author: a12e

src/corelib/kernel/qmetatype.cpp

@@ -74,12 +74,12 @@ namespace {
 struct QMetaTypeDeleter
 {
     const QtPrivate::QMetaTypeInterface *iface;
-    void operator()(void *data)
+    void operator()(void *data) const
     {
         if (iface->alignment > __STDCPP_DEFAULT_NEW_ALIGNMENT__) {
-            operator delete(data, std::align_val_t(iface->alignment));
+            operator delete(data, iface->size, std::align_val_t(iface->alignment));
         } else {
-            operator delete(data);
+            operator delete(data, iface->size);
         }
     }
 };