Fix cyclic_find packing when subseq=int

[push0ebp]

when instance of cyclic_find subseq argument is int, int to str packing is not working.
because any iter before isinstance check

before

def cyclic_find(subseq, alphabet = string.ascii_lowercase, n = None):
...
if any(c not in alphabet for c in subseq):
return -1

if isinstance(subseq, (int, long)):
    width = n * 8 or 'all'
    subseq = packing.pack(subseq, width, 'little', False)

cyclic_find(0x61616162)
Traceback (most recent call last):
File "", line 1, in
File "pwnlib/util/cyclic.py", line 101, in cyclic_find
if any(c not in alphabet for c in subseq):
TypeError: 'int' object is not iterable

after

def cyclic_find(subseq, alphabet = string.ascii_lowercase, n = 0):
...

if isinstance(subseq, (int, long)):
    width = n * 8 or 'all'
    subseq = packing.pack(subseq, width, 'little', False)

if any(c not in alphabet for c in subseq):
    return -1

cyclic_find(0x61616162)
4

it worked

[push0ebp]

#623

[junorouse]

hi

[TethysSvensson]

This was fixed as part of #636.