Fix regression introduced in trunk[4943]

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@4945 a333f486-631f-4898-b8df-5754b55c2be0

core/oql/expression.class.inc.php

@@ -17,7 +17,7 @@
 //   along with iTop. If not, see <http://www.gnu.org/licenses/>
 //
 
-lass MissingQueryArgument extends CoreException
+class MissingQueryArgument extends CoreException
 {
 }