[subset] Move OS/2 to subset2.
diff --git a/src/hb-subset.cc b/src/hb-subset.cc
index a614071..3f4c2e4 100644
--- a/src/hb-subset.cc
+++ b/src/hb-subset.cc
@@ -190,7 +190,7 @@
       result = _subset<const OT::cmap> (plan);
       break;
     case HB_OT_TAG_OS2:
-      result = _subset<const OT::OS2> (plan);
+      result = _subset2<const OT::OS2> (plan);
       break;
     case HB_OT_TAG_post:
       result = _subset2<const OT::post> (plan);