Switch back to oh-my-zsh.hide-dirty setting again

Commit 81004dfa reverted the change in 9b811fb6 when editing the merge conflict from #2928. This commit fixes that so that we don't make the same mistake again. First seen in http://git.io/Cdaj5Q

Switch back to oh-my-zsh.hide-dirty setting again
a301f567 · Marc Cornellà · df5b09e2 · a301f567
Commit a301f567 authored Nov 19, 2014 by Marc Cornellà
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git.zsh lib/git.zsh +1 -1

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--- a/lib/git.zsh
+++ b/lib/git.zsh
@@ -13,7 +13,7 @@ parse_git_dirty() {
  local STATUS=''
  local FLAGS
  FLAGS=('--porcelain')
-  if [[ "$(command git config --get oh-my-zsh.hide-status)" != "1" ]]; then
+  if [[ "$(command git config --get oh-my-zsh.hide-dirty)" != "1" ]]; then
    if [[ $POST_1_7_2_GIT -gt 0 ]]; then
      FLAGS+='--ignore-submodules=dirty'
    fi