Touch up on previous commit

https://github.com/harfbuzz/harfbuzz/pull/1273
diff --git a/src/hb-ot-shape-complex-use.cc b/src/hb-ot-shape-complex-use.cc
index 8c44fe0..addfb87 100644
--- a/src/hb-ot-shape-complex-use.cc
+++ b/src/hb-ot-shape-complex-use.cc
@@ -572,6 +572,15 @@
   HB_BUFFER_DEALLOCATE_VAR (buffer, use_category);
 }
 
+
+static void
+preprocess_text_use (const hb_ot_shape_plan_t *plan,
+		     hb_buffer_t              *buffer,
+		     hb_font_t                *font)
+{
+  _hb_preprocess_text_vowel_constraints (plan, buffer, font);
+}
+
 static bool
 compose_use (const hb_ot_shape_normalize_context_t *c,
 	     hb_codepoint_t  a,
@@ -592,7 +601,7 @@
   nullptr, /* override_features */
   data_create_use,
   data_destroy_use,
-  preprocess_text_vowel_constraints,
+  preprocess_text_use,
   nullptr, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
   nullptr, /* decompose */