Add implicit default constructor for nullptr

This patch simplifies use of QWindowsPointer when returning empty
pointer. By providing implicit constructor for empty pointer we can
avoid length QWindowsPointer<T>{} syntax when returing empty pointer
instead we can write {}. It also simplifies default construction of
objects with QWindowsPointer.

Pick-to: 6.3
Change-Id: I35869e950b13d96aaefb1d0cce9bccf03b14b621
Reviewed-by: Lars Knoll <lars.knoll@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/multimedia/windows/qwindowsiupointer_p.h b/src/multimedia/windows/qwindowsiupointer_p.h
index a96d70989..0cf73660b 100644
--- a/src/multimedia/windows/qwindowsiupointer_p.h
+++ b/src/multimedia/windows/qwindowsiupointer_p.h
@@ -19,7 +19,8 @@ template <class T>
 class QWindowsIUPointer
 {
 public:
-    explicit QWindowsIUPointer(T *ptr = nullptr) : m_ptr(ptr) {}
+    explicit QWindowsIUPointer(T *ptr) : m_ptr(ptr) {}
+    QWindowsIUPointer() : m_ptr(nullptr) {}
     QWindowsIUPointer(const QWindowsIUPointer<T> &uiPtr) : m_ptr(uiPtr.m_ptr) { if (m_ptr) m_ptr->AddRef(); }
     QWindowsIUPointer(QWindowsIUPointer<T> &&uiPtr) : m_ptr(uiPtr.m_ptr) { uiPtr.m_ptr = nullptr; }
     ~QWindowsIUPointer() { if (m_ptr) m_ptr->Release(); }