gdiffReconstructDCBuff: increase buff_size from 5 to 13
gdiffReconstructDCBuff: increase buff_size from 5 to 13

The buff_size must be at least 13 in order to accomodate cread and
readUBytesBE calls relative to buff + 1 with ob = 8 and lb = 4.

Bug: https://bugs.gentoo.org/543310
Reported-by: Aidan Thornton <b8498c958e33516288245633d54e28d9348b5d46@googlemail.com>
Signed-off-by: Zac Medico <a17fa1dcf5b7e2df0c563c7a30fa1870d6a8ff57@gentoo.org>
Signed-off-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@gmail.com>

ferringb/diffball,ferringb/diffball