Don't just take the last argument, take the first.

This patch was originally contributed as a workaround for the cases
where there were flags that took the first argument position.  This fix
was just plain wrong and this commit reverts it.

git-flow-feature

@@ -180,7 +180,7 @@ parse_args() {
 	parse_cmdline "$@"
 
 	# read arguments into global variables
-	NAME=$(last_arg "$@")
+	NAME=$1
 	BRANCH=$PREFIX$NAME
 }
 

git-flow-hotfix

@@ -124,7 +124,7 @@ parse_args() {
 	eval set -- "${FLAGS_ARGV}"
 
 	# read arguments into global variables
-	VERSION=$(last_arg "$@")
+	VERSION=$1
 	BRANCH=$PREFIX$VERSION
 }
 

git-flow-release

@@ -121,7 +121,7 @@ parse_args() {
 	eval set -- "${FLAGS_ARGV}"
 
 	# read arguments into global variables
-	VERSION=$(last_arg "$@")
+	VERSION=$1
 	BRANCH=$PREFIX$VERSION
 }
 

gitflow-common

@@ -44,14 +44,6 @@
 warn() { echo "$@" >&2; }
 die() { warn "$@"; exit 1; }
 
-# argument processing
-last_arg() {
-    if [ $# -ne 0 ]; then
-        shift $(expr $# - 1)
-        echo "$1"
-    fi
-}
-
 # set logic
 has() {
 	local item=$1; shift