patchupdate.py: Introduce a new Apply-After definition file variable.

debian/tools/patchinstall.sh.in

@@ -71,7 +71,7 @@ enable=1
 
 # Find location of patches
 patchdir="$(dirname "$(readlink -f "$0")")"
-if ! test -f "$patchdir/patchinstall.sh"; then
+if test ! -f "$patchdir/patchinstall.sh"; then
 	if test -f ./patchinstall.sh; then
 		patchdir="$(pwd)"
 	else
@@ -191,7 +191,8 @@ elif test "$backend" = "epatch"; then
 
 	if ! command -v epatch >/dev/null 2>&1 || \
 	   ! command -v ebegin >/dev/null 2>&1 || \
-	   ! command -v eend   >/dev/null 2>&1; then
+	   ! command -v eend   >/dev/null 2>&1 || \
+	   ! command -v die    >/dev/null 2>&1; then
 		abort "Shell functions epatch/ebegin/eend not found. You have to source this script from your ebuild."
 	fi
 
@@ -294,8 +295,8 @@ if test "$enable_patchlist" -eq 1; then
 
 	# Generate a temporary patch containing the patchlist and apply it
 	patch_data=$(cat "$patchlist" | sort)
-	patch_lines=$(echo "$patch_data" | wc -l)
 	if test ! -z "$patch_data"; then
+		patch_lines=$(echo "$patch_data" | wc -l)
 		patch_lines=$((${{patch_lines}}+21))
 		cat > "$patchlist" <<EOF
 From: Wine Staging Team <webmaster@fds-team.de>