QPainter: replace manual memory management [4/5]: emulationEngine

Use unique_ptr to indicate ownership.

The QPainter dtor is now empty, = default it.

As a drive-by, fix a non-sensical if (p) p = nullptr;

Change-Id: I5c811eb7de6abf8a9f279cf3630d5f86db6b3864
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/painting/qpainter_p.h b/src/gui/painting/qpainter_p.h
index c369922756..09de84f2b2 100644
--- a/src/gui/painting/qpainter_p.h
+++ b/src/gui/painting/qpainter_p.h
@@ -272,7 +272,7 @@ public:
     };
     std::unique_ptr<QPaintEngine, QPaintEngineDestructor> engine;
 
-    QEmulationPaintEngine *emulationEngine = nullptr;
+    std::unique_ptr<QEmulationPaintEngine> emulationEngine;
     QPaintEngineEx *extended = nullptr;
     QBrush colorBrush;          // for fill with solid color
 };