Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBufferQuartz2D.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBufferQuartz2D.cpp	(revision 35614)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBufferQuartz2D.cpp	(revision 35615)
@@ -399,5 +399,5 @@
         int bitmapBytesPerRow = m_width * 4;
         int bitmapByteCount = (bitmapBytesPerRow * m_height);
-        m_pBitmapData = RTMemAlloc(bitmapByteCount);
+        m_pBitmapData = RTMemAllocZ(bitmapByteCount);
         CGDataProviderRef dp = CGDataProviderCreateWithData(NULL, m_pBitmapData, bitmapByteCount, NULL);
         m_image = CGImageCreate(m_width, m_height, 8, 32, bitmapBytesPerRow, cs,