Initialise the "trials" variable to zero earlier in case we unexpectedly

error out early.

Found by:	clang static analyzer

usr.sbin/timed/timed/measure.c

@@ -86,6 +86,7 @@ measure(maxmsec, wmsec, hname, addr, print)
 	min_idelta = min_odelta = 0x7fffffff;
 	measure_status = HOSTDOWN;
 	measure_delta = HOSTDOWN;
+	trials = 0;
 	errno = 0;
 
 	/* open raw socket used to measure time differences */
@@ -138,7 +139,6 @@ measure(maxmsec, wmsec, hname, addr, print)
 	mstotvround(&twait, wmsec);
 
 	rcvcount = 0;
-	trials = 0;
 	while (rcvcount < MSGS) {
 		(void)gettimeofday(&tcur, 0);