fix COV 164298: integer overflow on multiplying timeout

ChangeLog

@@ -1,3 +1,7 @@
+Fri Mar 10 16:37:12 CET 2017
+	Fix hypothetical integer overflow for very, very large
+	timeout values. -CG
+
 Fri Mar 10 16:22:54 CET 2017
 	Handle case that we do not listen at all more gracefully
 	in MHD_start_daemon() and not pass '-1' to helper functions

src/microhttpd/daemon.c

@@ -3131,7 +3131,7 @@ MHD_get_timeout (struct MHD_Daemon *daemon,
       if (second_left > ULLONG_MAX / 1000)
         *timeout = ULLONG_MAX;
       else
-        *timeout = 1000 * second_left;
+        *timeout = 1000LL * second_left;
   }
   return MHD_YES;
 }