.vcs_git: fix condition of return; fix bug in .git

Update 18#;
Fix #15.

Author: LionNatsu

bashrc.d/.vcs_git

@@ -32,13 +32,17 @@ alias __git_branch="git branch 2>/dev/null | grep '*' | sed 's/*\ //g'"
 # From http://mediadoneright.com/content/ultimate-git-ps1-bash-prompt
 # Modified.
 _git_status() {
-	local gbr=$(git branch 2>/dev/null) || return 1
+	local gbr
+	gbr=$(git branch 2>/dev/null) || return 1
 	gbr=$(printf %s "$gbr" | grep '*' | sed 's/*\ //g')
-	local gst=$(LC_ALL=C git status)
-	if printf %s "$gst" | grep -q "nothing to commit"; then 
+	local gst
+	gst=$(LC_ALL=C git status 2>&1)
+	if printf %s "$gst" | grep -q "nothing to commit"; then
 		 echo -e "\01\e[1m\02@\01\e[0;32m\0002$gbr\01\e[0m\02"
-	elif printf %s "$gst" || grep -q "nothing added to commit"; then # Untracked
+	elif printf %s "$gst" | grep -q "nothing added to commit"; then # Untracked
 		 echo -e "\01\e[1m\02@\01\e[0;35m\0002$gbr\01\e[0m\02"
+	elif printf %s "$gst" | grep -q "must be run in a work tree"; then # Not in work tree
+		 echo -e "\01\e[1m\02@\01\e[0;37m\0002$gbr\01\e[0m\02"
 	else  # Change not added/not merged yet
 		 echo -e "\01\e[1m\02@\01$IRED\0002$gbr\01\e[0m\02"
 	fi