Revert "Explicitly lengthen some constants to 64 bits"

Guy already fixed the issue, I was looking at a stale buildbot page.

This reverts commit f9bfa976e67da2f8065f172de9ed06fad61762a8.

Change-Id: I04e2f1ddfae9558b6cec40740ffbb66a16c3fecb
Reviewed-on: https://code.wireshark.org/review/4046
Reviewed-by: Evan Huus <eapache@gmail.com>