Use isEmpty()

Change-Id: If26e7ca01d5f1f4fe5e98a2523660eb3c3783bc4
diff --git a/svtools/source/control/inettbc.cxx b/svtools/source/control/inettbc.cxx
index 7579687..3f152dd 100644
--- a/svtools/source/control/inettbc.cxx
+++ b/svtools/source/control/inettbc.cxx
@@ -562,8 +562,7 @@ void SvtMatchContext_Impl::doExecute()
    aURLs.clear();

    // check for input
    sal_uInt16 nTextLen = aText.getLength();
    if ( !nTextLen )
    if ( aText.isEmpty() )
        return;

    if( aText.indexOf( '*' ) != -1 || aText.indexOf( '?' ) != -1 )