OSL_TRACE->SAL in chart2..oox

Change-Id: I133a6441824bfbefcfcda130119b5c5d706f86b2
Reviewed-on: https://gerrit.libreoffice.org/31907
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

cppuhelper/source/component.cxx

@@ -204,7 +204,7 @@ void OComponentHelper::dispose()
         // in a multithreaded environment, it can't be avoided
         // that dispose is called twice.
         // However this condition is traced, because it MAY indicate an error.
-        OSL_TRACE( "OComponentHelper::dispose() - dispose called twice" );
+        SAL_WARN("cppuhelper",  "OComponentHelper::dispose() - dispose called twice" );
     }
 }