[array/vector] Rename len to length
diff --git a/src/hb-ot-layout-gsubgpos.hh b/src/hb-ot-layout-gsubgpos.hh
index ac6e646..532cf4b 100644
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@@ -2636,7 +2636,7 @@
 
   bool apply (hb_ot_apply_context_t *c) const
   {
-    for (unsigned int i = 0; i < subtables.len; i++)
+    for (unsigned int i = 0; i < subtables.length; i++)
       if (subtables[i].apply (c))
 	return true;
     return false;