Fix build with clang and getline(3)

The getline(3) failure was hidden by the fact the port was said to build with
gcc from ports which occulted the getline(3) change because it bundles the
system headers from when it was built (WTF???)

Adding -Wno-return-type to cflags allows to build with clang

news/cnews/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	cnews
 PORTVERSION=	cr.g
-PORTREVISION=	14
+PORTREVISION=	15
 CATEGORIES=	news
 MASTER_SITES=	ftp://ftp.cs.toronto.edu/pub/c-news/ \
 		ftp://ftp.funet.fi/pub/unix/news/cnews/ \
@@ -38,7 +38,7 @@ LICENSE_FILE=	${WRKSRC}/COPYRIGHT
 MAKE_JOBS_UNSAFE=	yes
 
 USES=		tar:Z
-USE_GCC=	any
+CFLAGS+=	-Wno-return-type
 
 DIST_SUBDIR=	${DISTNAME}
 NO_WRKSUBDIR=	yes
@@ -94,6 +94,10 @@ pre-patch:
 		${DISTDIR}/${DIST_SUBDIR}/${PGPVERIFY} \
 		> ${WRKSRC}/${PGPVERIFY}
 
+post-patch:
+	@${REINPLACE_CMD} -e 's/getline/get_line/g' ${WRKSRC}/readnews/active.c \
+		${WRKSRC}/readnews/newsrc.c
+
 pre-configure:
 .for i in conf/quiz.def conf/substitutions include/config.make
 	${REINPLACE_CMD} \