[PATCH 0/4] Remove some uses of iterate_over_inferiors

[Tom Tromey]

This series removes some uses of iterate_over_inferiors in favor of
foreach-style iteration.  I find the latter simpler both to debug and
to read.

There are more instances of iterate_over_inferiors, and other
iterate_over_* functions -- this series is just a starter to see
whether others agree, so let me know what you think.

Tested on x86-64 Fedora by the buildbot.

Tom