CXTPButton::SetIcon(nullptr) crashes in 19.2

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   Hi,

we got a crash when upgrading to 19.2 due to code that removes an icon from a CXTPButton by calling it with SetIcon(CSize(0,0), nullptr); Could you guys add a nullptr check?

BOOL CXTPButton::SetIcon(CSize size, CXTPImageManagerIcon* pIcon, BOOL bRedraw /*= TRUE*/)
{
	// Construct the icon manager.
	CMDTARGET_RELEASE(m_pIcon);

	if (pIcon->IsVectorIcon()) // add check for nullptr
		m_szVectorIcon = size;

	m_pIcon = pIcon;

	// Redraw the button.
	if (bRedraw)
		RedrawButton();

	return TRUE;
}