session: cleanup session event types

Change-Id: I87bdf705341dd760f0be907a663aa64140977d39
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session-apps/http_server.c b/src/vnet/session-apps/http_server.c
index 2dfb6a4..f702b74 100644
--- a/src/vnet/session-apps/http_server.c
+++ b/src/vnet/session-apps/http_server.c
@@ -571,7 +571,7 @@
 
 postpone:
   (void) svm_fifo_set_event (hs->rx_fifo);
-  session_send_io_evt_to_thread (hs->rx_fifo, FIFO_EVENT_BUILTIN_RX);
+  session_send_io_evt_to_thread (hs->rx_fifo, SESSION_IO_EVT_BUILTIN_RX);
   return 0;
 
 wait_for_data: