Type-o, change from[...] = 0 to fromb[...] = 0. The incorrect buffer

was having its last element zero'd.  It turns out not to be a security
    hole or to have any real effect on the code because 'from' was previously
    pointing to a buffer of the same size as 'fromb', and the last
    element in fromb is already 0 anyway due to the use of sizeof(fromb)-1
    in the strncpy() call.  But I'm not pressing my luck so only the type-o
    is being fixed.

usr.sbin/lpr/lpd/lpd.c

@@ -590,7 +590,7 @@ chkhost(f)
 			inet_ntoa(f->sin_addr));
 
 	(void) strncpy(fromb, hp->h_name, sizeof(fromb) - 1);
-	from[sizeof(fromb) - 1] = '\0';
+	fromb[sizeof(fromb) - 1] = '\0';
 	from = fromb;
 
 	/* Check for spoof, ala rlogind */