On stock centOS 6.3 machines without "git" installed the command "which git"
returns an error to stderr and as a consequence every Salt command prints this
same error to the screen. This one-line fix prevents this from occurring.
Merge pull request #3439 from edlane/which-git-fix

Spurious Salt CLI error messages on CentOS 6.3 machines without "git" installed
More finally closures, may help with #3434