bug#7231: 23.3; Don't rebuild buffer list in iswitchb-visit-buffer

[Stefan Monnier]

> The original change was to address buffer name changes due to packages
> such as uniquify.el. But it causes another annoying bug: changing the
> order of matches seen by users.

> This reverts it.

I don't think we should just revert.  If the fix for the old problem
introduces a new problem, we should try and find a solution that fixes
both problems at once.


        Stefan