since libip is now used in kernel, memcpy is eshewed

Notes:
Wed Jan 28 09:27:55 EST 2009 jmk
Wed Jan 28 09:39:44 EST 2009 jmk
    
    If a job's worth doing, it's worth doing well,
    e.g. if the use of 'memcpy is eshewed[sic]' in one
    place for good reason its use elsewhere should be
    evaluated for change also (and a patch provided).
    Code which is imported substantially 'as is' from
    other systems would likely be exempt from such
    change for maintenance and stylistic reasons.


Reference: /n/sources/patch/sorry/libipkern
Date: Tue Jan 27 17:43:07 CET 2009
Signed-off-by: quanstro@quanstro.net
Reviewed-by: geoff

--- /sys/src/libip/parseip.c	Tue Jan 27 17:43:02 2009
+++ /sys/src/libip/parseip.c	Tue Jan 27 17:43:00 2009
@@ -179,6 +179,6 @@
 		if(i > 0)
 			*a = ~((1<<(8-i))-1);
 	} else 
-		memcpy(mask, defmask(addr), IPv4addrlen);
+		memmove(mask, defmask(addr), IPv4addrlen);
 	return p;
 }