main/sdl2_image: improve abuild and fix license

main/sdl2_image/APKBUILD

@@ -2,30 +2,21 @@
 # Maintainer: Francesco Colista <fcolista@alpinelinux.org>
 pkgname=sdl2_image
 pkgver=2.0.1
-pkgrel=0
+pkgrel=1
+_pkgname=SDL2_image
 pkgdesc="A simple library to load images of various formats as SDL surfaces"
 url="http://www.libsdl.org/projects/SDL_image/"
 arch="all"
-license="LGPL2+"
+license="zlib"
 depends=""
 makedepends="sdl2-dev libpng-dev libjpeg-turbo-dev 
-			libwebp-dev tiff-dev zlib-dev"
+	libwebp-dev tiff-dev zlib-dev"
 subpackages="$pkgname-dev"
-source="http://www.libsdl.org/projects/SDL_image/release/SDL2_image-${pkgver}.tar.gz"
-
-_builddir="$srcdir"/SDL2_image-$pkgver
-prepare() {
-	cd "$_builddir"
-	update_config_sub || return 1
-	for i in $source; do
-		case $i in
-		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
-		esac
-	done
-}
+source="http://www.libsdl.org/projects/SDL_image/release/$_pkgname-$pkgver.tar.gz"
+builddir="$srcdir/$_pkgname-$pkgver"
 
 build() {
-	cd "$_builddir"
+	cd "$builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -38,7 +29,7 @@ build() {
 }
 
 package() {
-	cd "$_builddir"
+	cd "$builddir"
 	make DESTDIR="$pkgdir" install || return 1
 }