Sync gen-vowel-constraints.py with current output
diff --git a/src/gen-vowel-constraints.py b/src/gen-vowel-constraints.py
index afb21d9..1340d97 100755
--- a/src/gen-vowel-constraints.py
+++ b/src/gen-vowel-constraints.py
@@ -180,6 +180,9 @@
print ('\t\t\t\t hb_buffer_t *buffer,')
print ('\t\t\t\t hb_font_t *font HB_UNUSED)')
print ('{')
+print ('#if defined(HB_NO_OT_SHAPE_COMPLEX_VOWEL_CONSTRAINTS)')
+print (' return;')
+print ('#endif')
print (' if (buffer->flags & HB_BUFFER_FLAG_DO_NOT_INSERT_DOTTED_CIRCLE)')
print (' return;')
print ()