cli_check_mydoom_log: Avoid unaligned access.

[sebastianas]

fmap_need_off_once() may return an unaligned pointer. This in return leads to an unaligned access during the load of the uint32_t variables loading to failures on architectures not supporting unaligned access.

This was reported to the Debian BTS as #1073128.

[bigeasy: Commit message, reworked the patch a bit].

Link: https://bugs.debian.org/1073128