Use scoped pointers to hold dialogs

assigning a component or a script to a dialog control should not results in a crash in
dbgutil-enabled build

Change-Id: I06d11d8d51d0fe8d1b2a7217c51c1dfc8d3f8c97
Reviewed-on: https://gerrit.libreoffice.org/20695Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Oliver Specht <oliver.specht@cib.de>

cui/source/customize/macropg.cxx

@@ -654,7 +654,7 @@ long _SvxMacroTabPage::GenericHandler_Impl( _SvxMacroTabPage* pThis, PushButton*
                 )
             )
     {
-        VclPtrInstance< AssignComponentDialog > pAssignDlg( pThis, sEventURL );
+        ScopedVclPtrInstance< AssignComponentDialog > pAssignDlg( pThis, sEventURL );
 
         short ret = pAssignDlg->Execute();
         if( ret )
@@ -668,7 +668,7 @@ long _SvxMacroTabPage::GenericHandler_Impl( _SvxMacroTabPage* pThis, PushButton*
     else if( bAssEnabled )
     {
         // assign pressed
-        VclPtrInstance< SvxScriptSelectorDialog > pDlg( pThis, false, pThis->GetFrame() );
+        ScopedVclPtrInstance< SvxScriptSelectorDialog > pDlg( pThis, false, pThis->GetFrame() );
         if( pDlg )
         {
             short ret = pDlg->Execute();