use rtl::Reference in SfxInPlaceClient

instead of manual acquire/release

Change-Id: I4ebbdbcbd619991c3dae0733b797f310903f96e6

include/sfx2/ipclient.hxx

@@ -25,6 +25,7 @@
 #include <com/sun/star/uno/Reference.h>
 #include <com/sun/star/embed/Aspects.hpp>
 #include <com/sun/star/embed/XEmbeddedObject.hpp>
+#include <rtl/ref.hxx>
 
 #include <tools/gen.hxx>
 
@@ -41,7 +42,7 @@ class SFX2_DLLPUBLIC SfxInPlaceClient
 {
 friend class SfxInPlaceClient_Impl;
 
-    SfxInPlaceClient_Impl*  m_pImp;
+    rtl::Reference<SfxInPlaceClient_Impl>  m_xImp;
     SfxViewShell*           m_pViewSh;
     VclPtr<vcl::Window>     m_pEditWin;