Fix typo

Change-Id: I08d6e2cb30c54b9e7b11498850e5f5cd7de1a98d
Reviewed-on: https://gerrit.libreoffice.org/70994
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

cppuhelper/source/interfacecontainer.cxx

@@ -177,7 +177,7 @@ void OInterfaceContainerHelper::copyAndResetInUse()
     OSL_ENSURE( bInUse, "OInterfaceContainerHelper not in use" );
     if( bInUse )
     {
-        // this should be the worst case. If a iterator is active
+        // this should be the worst case. If an iterator is active
         // and a new Listener is added.
         if( bIsList )
             aData.pAsSequence = new Sequence< Reference< XInterface > >( *aData.pAsSequence );