Remove a couple of unused consts
diff --git a/src/main.cc b/src/main.cc
index 377d139..819100e 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -106,8 +106,8 @@
 
       switch (table.tag) {
 
-      case GSUBGPOS::GSUBTag:
-      case GSUBGPOS::GPOSTag:
+      case HB_OT_TAG_GSUB:
+      case HB_OT_TAG_GPOS:
 	{
 
 	const GSUBGPOS &g = *CastP<GSUBGPOS> (font_data + table.offset);