arch/isa_parser.py:
Minor cleanup of operand type and traits code:
- build operand size map right away when types are defined
instead of waiting to do it lazily
- check that operand types have been defined before operands
- don't use 'type' as a variable name
- use isinstance() instead of checking for types directly
--HG--
extra : convert_revision : 099c1ee8d490f9c38316749bf87209388c55c971