converters/aish: Fix build with lvm15

- Add LICENSE NONE

converters/aish/Makefile

@@ -8,10 +8,18 @@ MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Ish/uuencode/Base64 converter
 WWW=		https://hp.vector.co.jp/authors/VA004474/etc/etc.html
 
+LICENSE=	NONE
+
 MAKE_ARGS=	DSTDIR=${STAGEDIR}${PREFIX}/bin
 
 OPTIONS_DEFINE=	DOCS
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=int-conversion
+.endif
+
 post-install:
 	@${MKDIR} ${STAGEDIR}${PREFIX}/share/doc/ja/aish
 	${INSTALL_DATA} ${WRKSRC}/aish.txt ${STAGEDIR}${PREFIX}/share/doc/ja/aish