Fix build with -fno-common

While here add dependencies reported as missing by stage-qa.

net-im/icmpchat/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	icmpchat
 PORTVERSION=	0.6
+PORTREVISION=	1
 CATEGORIES=	net-im
 MASTER_SITES=	SF
 

net-im/icmpchat/files/patch-sendicmp.c

@@ -0,0 +1,11 @@
+--- sendicmp.c.orig	2003-04-08 10:58:56 UTC
++++ sendicmp.c
+@@ -3,6 +3,8 @@
+ #include "config.h"
+ #include "sendicmp.h"
+ 
++struct sockaddr_in	saddr;
++
+ int 
+ sendpacket(int rawsock, 
+ 	   const unsigned char *text, 

net-im/icmpchat/files/patch-sendicmp.h

@@ -0,0 +1,10 @@
+--- sendicmp.h.orig	2003-04-06 16:21:11 UTC
++++ sendicmp.h
+@@ -16,6 +16,6 @@
+ 
+ int sendpacket(int, const unsigned char *, const char *, int, int);
+ int in_cksum(u_short *, int);
+-struct sockaddr_in	saddr;
++extern struct sockaddr_in	saddr;
+ 
+ #endif /* SENDICMP_H */