Merge branch 'master' into ttf-instructions-composite-flags

# Conflicts:
#	Lib/extractor/formats/opentype.py

Author: jenskutilek

Lib/extractor/formats/opentype.py

@@ -69,6 +69,9 @@ def extractGlyphOrder(source, destination):
 
 
 def extractInstructions(source, destination):
+    if "glyf" not in source:
+        return
+
     lib = destination.lib[TRUETYPE_INSTRUCTIONS_KEY] = {
         "formatVersion": 1,
         "maxFunctionDefs": 0,