fix regression that caused a source to be closed after 10secs when sourceOnDemand is yes (#949)

internal/core/path.go

@@ -427,6 +427,8 @@ func (pa *path) run() {
 						pa.onDemandStaticSourceReadyTimer.Stop()
 						pa.onDemandStaticSourceReadyTimer = newEmptyTimer()
 
+						pa.onDemandStaticSourceScheduleClose()
+
 						for _, req := range pa.describeRequestsOnHold {
 							req.res <- pathDescribeRes{
 								stream: pa.stream,
@@ -438,8 +440,6 @@ func (pa *path) run() {
 							pa.handleReaderSetupPlayPost(req)
 						}
 						pa.setupPlayRequestsOnHold = nil
-
-						pa.onDemandStaticSourceScheduleClose()
 					}
 
 					req.res <- pathSourceStaticSetReadyRes{stream: pa.stream}