Fix compile of programs/winedbg/elf.c on NetBSD 1.6

[Eric Pouech]

Yorick Hardy a écrit :
> Thanks for your input. It is very likely that I misunderstood, but I found
> the following in /usr/include/elf.h on NetBSD 1.6
[snip]
> Is this consistent with what you said? 
seems like i misread some of the ELF specs. Your fix is right (sorry for 
the noise). BTW, you could also remove the use of STN_UNDEF in elf.c 
while you're at it.
A+