fix OSX build

after my commit cb4fa1d1e2
"use uno::Reference::set method instead of assignment"

Change-Id: Iecbcd2ffd521913a63374a56c5179065cca42f09

connectivity/source/drivers/macab/MacabStatement.cxx

@@ -460,7 +460,7 @@ OSL_TRACE("Mac OS Address book - SQL Request: %s", OUtoCStr(sql));
             impl_throwError(STR_QUERY_TOO_COMPLEX);
     }
 
-    m_xResultSet.set(pResult);
+    m_xResultSet = Reference<XResultSet>(pResult);;
     return xRS;
 }