pypa/pip — pull request #657 by qwcode (2012-09-03 18:03:27+00:00)
Title: Issue 656   just log warning when no uninstall paths, don't raise error

fix for issue #656

pull #587 had added an installation error when the uninstall path set had no paths.

2 changes:
1) dropping back to just a notification/return, not a raise
2) let the non-local notification/return happen first, before this one