timer: fix integer overflow in timer_delay()

Fixes a regression: for output_plugin.delay(), we added a method to
the timer class which returns the delay in milliseconds.  This fails
to detect negative values, because the unsigned integer is divided by
1000, and then casted to signed.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/timer.c b/src/timer.c
index e125b100..0b3b1198 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -74,7 +74,7 @@ void timer_add(Timer *timer, int size)
 unsigned
 timer_delay(const Timer *timer)
 {
-	int64_t delay = (timer->time - now()) / 1000;
+	int64_t delay = (int64_t)(timer->time - now()) / 1000;
 	if (delay < 0)
 		return 0;