[subset/glyf] Fix another leak

src/OT/glyf/glyf.hh

@@ -102,8 +102,6 @@ struct glyf
     if (font)
       hb_font_destroy (font);
 
-    // Calculate glyph sizes for `loca` table
-
     hb_vector_t<unsigned> padded_offsets;
     if (unlikely (!padded_offsets.alloc (glyphs.length, true)))
     {
@@ -139,7 +137,11 @@ struct glyf
     }
 
     glyf *glyf_prime = c->serializer->start_embed <glyf> ();
-    if (unlikely (!glyf_prime)) return_trace (false);
+    if (unlikely (!glyf_prime))
+    {
+      _free_compiled_subset_glyphs (glyphs);
+      return_trace (false);
+    }
 
     bool result = glyf_prime->serialize (c->serializer, hb_iter (glyphs), use_short_loca, c->plan);
     if (c->plan->normalized_coords && !c->plan->pinned_at_default)