#1 Minor tweak for Python 2.2.2

[Jason Kane]

If you're getting "Data to decrypt must be a string"
from the AES module and you're sending it a string,
odds are this is what you need:

aes.py, line 192

Old:
if str(type(data)) != "<type 'string'>":
raise TypeError('Data to decrypt must be a string!')

New:
if type(data) != type(""):
raise TypeError('Data to ...

--------
Somewhere along the line the return value of
type(stringvar) changed from <type 'string'> to <type
'str'>. This adjustment should work for any version of
Python.