IcingaDB::PrepareObject(): round Notification#times.{begin,end} not t…

…o crash Go daemon

The latter expects ints, not floats - not to mention strings.
Luckily Icinga already enforces numeric strings so that we can cast it to number.

lib/icingadb/icingadb-objects.cpp

@@ -1383,8 +1383,11 @@ bool IcingaDB::PrepareObject(const ConfigObject::Ptr& object, Dictionary::Ptr& a
 			attributes->Set("timeperiod_id", GetObjectIdentifier(timeperiod));
 
 		if (notification->GetTimes()) {
-			attributes->Set("times_begin", notification->GetTimes()->Get("begin"));
-			attributes->Set("times_end",notification->GetTimes()->Get("end"));
+			auto begin (notification->GetTimes()->Get("begin"));
+			auto end (notification->GetTimes()->Get("end"));
+
+			attributes->Set("times_begin", begin.GetType() == ValueEmpty ? begin : Value(std::round((double)begin)));
+			attributes->Set("times_end", end.GetType() == ValueEmpty ? end : Value(std::round((double)end)));
 		}
 
 		attributes->Set("notification_interval", notification->GetInterval());