Fix channel_exit()ing user_remove()

When user user_remove() is called, that user quits all of the channels
it was belonging to. But since channel_exit() mutates chanels array, it
is incorrect to 1) compare with channels_c 2) access channels[i]. As a
fix, 1) channels_c is not being compared throughout the loop but is
assigned to i once, and then i decrements 2) channels is being accessed
only as channels[0]

0 files changed, 0 insertions, 0 deletions