gnucash: add locale workaround to the .desktop file for musl

srcpkgs/gnucash/template

@@ -1,7 +1,7 @@
 # Template file for 'gnucash'
 pkgname=gnucash
 version=3.2
-revision=3
+revision=4
 build_style=cmake
 configure_args="-DWITH_SQL=0 -DWITH_PYTHON=1"
 hostmakedepends="pkg-config guile python3 libxslt perl"
@@ -27,6 +27,16 @@ case "$XBPS_TARGET_MACHINE" in
 	*)      CXXFLAGS="-Wno-deprecated-declarations";;
 esac
 
+post_install() {
+	case "$XBPS_TARGET_MACHINE" in
+		# startup fails in scheme code when the locale is set to anything
+		# else on musl
+		*-musl) sed -i -e 's/Exec=gnucash/Exec=env LANG=C gnucash/' \
+			${DESTDIR}/usr/share/applications/gnucash.desktop
+			;;
+	esac
+}
+
 gnucash-devel_package() {
 	short_desc+=" - development files"
 	depends="gnucash>=${version}_${revision}"