Fix build with -fno-common

While here add license (GPLv2)

editors/hexcurse/Makefile

@@ -3,12 +3,16 @@
 
 PORTNAME=	hexcurse
 PORTVERSION=	1.55
+PORTREVISION=	1
 CATEGORIES=	editors
 MASTER_SITES=	https://BSDforge.com/projects/source/editors/hexcurse/
 
 MAINTAINER=	jadawin@FreeBSD.org
 COMMENT=	Versatile ncurses-based hex editor
 
+LICENSE=	GPLv2
+LICENSE_FILE=	${WRKSRC}/COPYING
+
 USES=		ncurses
 
 GNU_CONFIGURE=	yes

editors/hexcurse/files/patch-include_hex.h

@@ -0,0 +1,11 @@
+--- include/hex.h.orig	2003-12-23 03:08:25 UTC
++++ include/hex.h
+@@ -111,7 +111,7 @@ extern char EBCDIC[256];
+ #define max(a,b) ((a) >(b) ? (a) : (b))
+ #endif
+ 
+-FILE *fpIN, *fpOUT;				/* global file ptrs           */
++extern FILE *fpIN, *fpOUT;			/* global file ptrs           */
+ 
+ /* function prototypes */
+ 

editors/hexcurse/files/patch-src_file.c

@@ -0,0 +1,13 @@
+--- src/file.c.orig	2003-12-15 13:43:47 UTC
++++ src/file.c
+@@ -18,7 +18,9 @@
+ \******************************************************************************/
+ #include "hex.h"
+ 
+-/*******************************************************\
++FILE *fpIN, *fpOUT;						/* global file ptrs   */
++
++/*******************************************************	\
+  * Description: prints out a line of text to the screen*
+  *		the current address line and both the          *
+  *		hex and decimal values for the current         *