Minor
diff --git a/pyotlss.py b/pyotlss.py
index f6a0276..ebc39af 100755
--- a/pyotlss.py
+++ b/pyotlss.py
@@ -554,6 +554,10 @@
 			g.program.fromBytecode([])
 	return True
 
+@add_method(fontTools.ttLib.getTableClass('CFF '))
+def subset_glyphs (self, glyphs):
+	assert 0, "unimplemented"
+
 @add_method(fontTools.ttLib.getTableClass('cmap'))
 def prune_pre_subset (self, options):
 	if not options['legacy-cmap']:
@@ -770,8 +774,6 @@
 				if verbose:
 					print tag, "pruned."
 
-
-
 	glyphOrder = font.getGlyphOrder()
 	glyphOrder = [g for g in glyphOrder if g in glyphs_closed]
 	font.setGlyphOrder (glyphOrder)