long(0) -> 0
long(0) -> 0

There is no need to cast 0 to 'long' even if we want to compare it to long
numbers in modern pythons.

Signed-off-by: Sebastian Spaeth <98dcb2717ddae152d5b359c6ea97e4fe34a29d4c@SSpaeth.de>

frioux/offlineimap,frioux/offlineimap