Patch to fix recent clnt_udp change

[H.J. Lu]

> 
> 
> With the current glibc CVS version I get the following error:
> clnt_udp.c:270: warning: `anyup' might be used uninitialized in this function
> 
> Looking at the code, the warning is justified, anyup isn't initialized 
> at all:-(.
> 

Ulrich left out

	anyup = 0;

before

	for (;;)

I prefer it there since it may not be always necessary.

H.J.