[Python-modules-team] Bug#860656: forwarded upstream

[Hans-Christoph Steiner]

Control: forwarded -1 https://bitbucket.org/wooster/biplist/issues/8

Since the plist format stores the length of the integer, storing a long
should always return a long:

<integer> 0001 nnnn # of bytes is 2^nnnn, big-endian bytes
https://en.wikipedia.org/wiki/Property_list#Mac_OS_X

On python3 this does not matter, since there is no long type, only int.