[ot] Short-circuit base instance advance variation

1e05ea79 · Behdad Esfahbod · 54b2b937 · 1e05ea79
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src/hb-ot-hmtx-table.hh src/hb-ot-hmtx-table.hh +1 -1

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--- a/src/hb-ot-hmtx-table.hh
+++ b/src/hb-ot-hmtx-table.hh
@@ -144,7 +144,7 @@ struct hmtxvmtx
      }

      return table->longMetric[MIN (glyph, (uint32_t) num_advances - 1)].advance
-	   + var_table->get_advance_var (glyph, font->coords, font->num_coords); // TODO Optimize?!
+	   + (font->num_coords ? var_table->get_advance_var (glyph, font->coords, font->num_coords) : 0); // TODO Optimize?!
    }

    public: