loplugin:casttovoid: sax

Change-Id: Id8ac78d146dc63168fe9f76c94cd1bf0d2b1b6d9
diff --git a/sax/source/tools/fastserializer.cxx b/sax/source/tools/fastserializer.cxx
index ff74fe3..0642cbaa 100644
--- a/sax/source/tools/fastserializer.cxx
+++ b/sax/source/tools/fastserializer.cxx
@@ -259,7 +259,6 @@ namespace sax_fastparser {
            }
        }
        SAL_WARN_IF( !bGood && nLen > 1, "sax", "in '" << OString(pStr,std::min<sal_Int32>(nLen,42)) << "'");
        (void)bGood;
    }

    void FastSaxSerializer::endDocument()