ps23 More bytes fixes.  All ''join()'s fixed
diff --git a/Lib/fontTools/ttLib/tables/ttProgram.py b/Lib/fontTools/ttLib/tables/ttProgram.py
index a3401a6..cfc9d71 100644
--- a/Lib/fontTools/ttLib/tables/ttProgram.py
+++ b/Lib/fontTools/ttLib/tables/ttProgram.py
@@ -260,7 +260,7 @@
 	
 	def fromXML(self, name, attrs, content, ttFont):
 		if name == "assembly":
-			self.fromAssembly(''.join(content))
+			self.fromAssembly(strjoin(content))
 			self._assemble()
 			del self.assembly
 		else: