Removed un-necessary shifts and reset index of variable

bare-arch-install.sh

@@ -18,9 +18,8 @@ get_disks () {
 
 get_choices () {
 	local PROMPT="$1"
-	shift
-	local -n OUTPUT_VAR="$1"
-	shift 
+	local -n OUTPUT_VAR="$2"
+	shift 2
 	local -a OPTIONS=( $@ )
 
 	select item in ${OPTIONS[@]} quit; do
@@ -45,8 +44,7 @@ get_choice () {
 	echo "1: $1"
 	local PROMPT="$1"
 	local -n OUTPUT_VAR="$2"
-	shift 
-	shift 
+	shift 2
 	local -a OPTIONS=( $@ )
 
 	select item in ${OPTIONS[@]} quit; do