avmedia: avoid passing an empty any to InitPropertySequence()

Regression from b1534edf (tdf#89592
Using initializer_lists to populate Sequence<PropertyValue>,
2015-03-07).

Additionally, avoid makeAny() on the Any, the original code didn't do
that.

Thanks to lgodard/sberg for noticing these.

Change-Id: Icb3a6039885c582ba9f789c5c4768b865b593aee

avmedia/source/framework/mediatoolbox.cxx

@@ -149,12 +149,12 @@ void MediaToolBoxControl::implExecuteMediaControl( const MediaItem& rItem )
 {
     MediaItem                               aExecItem( SID_AVMEDIA_TOOLBOX );
     uno::Any                                aAny;
-    auto aArgs(::comphelper::InitPropertySequence({
-        { "AVMediaToolBox", makeAny(aAny) }
-    }));
 
     aExecItem.merge( rItem );
     aExecItem.QueryValue( aAny );
+    auto aArgs(::comphelper::InitPropertySequence({
+        { "AVMediaToolBox", aAny }
+    }));
 
     Dispatch( ".uno:AVMediaToolBox" , aArgs );
 }