Don't attempt to create a dummy fsspec if the user cancelled out, just

return None.

For now, if the user asks for TEXT files files without type are also
accepted. But it is time to phase out StandardGetFile and friends, really.

Mac/Lib/macfsn.py

@@ -12,6 +12,9 @@ _curfolder = None
 _movablemodal = 1
 
 def _mktypelist(typelist):
+	# Workaround for OSX typeless files:
+	if 'TEXT' in typelist and not '\0\0\0\0' in typelist:
+		typelist = typelist + ('\0\0\0\0',)
 	if not typelist:
 		return None
 	data = 'Pyth' + struct.pack("hh", 0, len(typelist))
@@ -44,7 +47,7 @@ def _PromptGetFile(prompt, *typelist):
 		if arg[0] != -128: # userCancelledErr
 			raise Nav.error, arg
 		good = 0
-		fss = macfs.FSSpec(':cancelled')
+		fss = None
 	else:
 		if rr.selection:
 			fss = rr.selection[0]
@@ -74,7 +77,7 @@ def _StandardPutFile(prompt, default=None):
 		if arg[0] != -128: # userCancelledErr
 			raise Nav.error, arg
 		good = 0
-		fss = macfs.FSSpec(':cancelled')
+		fss = None
 	else:
 		fss = rr.selection[0]
 	return fss, good
@@ -115,7 +118,7 @@ def _GetDirectory(prompt=None):
 		if arg[0] != -128: # userCancelledErr
 			raise Nav.error, arg
 		good = 0
-		fss = macfs.FSSpec(':cancelled')
+		fss = None
 	else:
 		fss = rr.selection[0]
 	return fss, good