pkg/33930: net/netcat6 failes to build with gcc 4

[j+nbsd%2006.salmi.ch@localhost]

>Number:         33930
>Category:       pkg
>Synopsis:       net/netcat6 failes to build with gcc 4
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 06 12:50:00 +0000 2006
>Originator:     Jukka Salmi
>Release:        NetBSD 3.99.21
>Environment:
gcc version 4.1.2 20060628 prerelease (NetBSD nb1 20060602)
System: NetBSD moray.salmi.ch 3.99.21 NetBSD 3.99.21 (MORAY.APM) #0: Wed Jul 5 
20:51:26 CEST 2006 
build%moray.salmi.ch@localhost:/build/nbsd/i386/sys/arch/i386/compile/MORAY.APM 
i386
Architecture: i386
Machine: i386
>Description:
Building net/netcat6 fails (see below).
>How-To-Repeat:
$ cd pkgsrc/net/netcat6 && make
[...]
netsupport.c:42: warning: function declaration isn't a prototype
netsupport.c:42: error: conflicting types for 'alloca'
*** Error code 1
[...]
>Fix: