[otlLib] Return None if coverage is empty

2016-01-22 19:27:33 +01:00 · 2016-01-22 19:27:33 +01:00 · 564af5a65c
commit 564af5a65c
parent 577a1500e5
1 changed files with 2 additions and 0 deletions
--- a/Lib/fontTools/otlLib/builder.py
+++ b/Lib/fontTools/otlLib/builder.py
@ -5,6 +5,8 @@ from fontTools.ttLib.tables.otBase import ValueRecord, valueRecordFormatDict


 def buildCoverage(glyphs, glyphMap):
+    if not glyphs:
+        return None
    self = ot.Coverage()
    self.glyphs = sorted(glyphs, key=glyphMap.__getitem__)
    return self