gnucap: fix the build with ports-gcc

OK bentley@

cad/gnucap/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.20 2019/07/12 20:43:45 sthen Exp $
+# $OpenBSD: Makefile,v 1.21 2019/08/13 13:36:00 cwen Exp $
 
 # gcc spins compiling d_mos7
 NOT_FOR_ARCHS=		m88k
@@ -6,7 +6,7 @@ NOT_FOR_ARCHS=		m88k
 COMMENT=		Gnu Circuit Analysis Package
 
 DISTNAME=		gnucap-0.35
-REVISION=		8
+REVISION=		9
 CATEGORIES=		cad
 
 HOMEPAGE=		http://www.gnucap.org/

cad/gnucap/patches/patch-src_plot_cc

@@ -0,0 +1,17 @@
+$OpenBSD: patch-src_plot_cc,v 1.1 2019/08/13 13:36:00 cwen Exp $
+
+ports-gcc fix for
+error: two or more data types in declaration of 'adata'
+
+Index: src/plot.cc
+--- src/plot.cc.orig
++++ src/plot.cc
+@@ -230,7 +230,7 @@ static void plotarg(
+ 	double yhi,
+ 	double zhi)
+ {
+-  auto char adata[MAXWIDTH+1];     /* actual data. copy emptydata, insert */
++  char adata[MAXWIDTH+1];     /* actual data. copy emptydata, insert */
+   char *xxs;				     /* string representation of xx */
+   memcpy(adata, emptydata, MAXWIDTH); /* copy prototype */
+   xxs = ftos( xx, 11, 5, IO::formaat );