fix a 'warning' at compilation

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2262 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/numerotationcontextcommands.cpp

@@ -226,6 +226,7 @@ FolioNum::FolioNum (Diagram *d):
  * @return the represented string of num
  */
 QString FolioNum::toRepresentedString(const QString str) const {
+	Q_UNUSED(str);
 	return (QString::number(diagram_ -> folioIndex() + 1));
 }