Fixed #4729: Grant and Revoke update (field)

(cherry picked from commit 741712e)

src/jrd/dfw.epp

@@ -2588,10 +2588,9 @@ static bool grant_privileges(thread_db* tdbb, SSHORT phase, DeferredWork* work,
 	switch (phase)
 	{
 	case 1:
-	case 2:
 		return true;
 
-	case 3:
+	case 2:
 		GRANT_privileges(tdbb, work->dfw_name, work->dfw_id, transaction);
 		break;