qapi-event: Eliminate global variable event_enum_value

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1442401589-24189-11-git-send-email-armbru@redhat.com>
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py
index aed45d6..537da17 100644
--- a/scripts/qapi-event.py
+++ b/scripts/qapi-event.py
@@ -137,7 +137,7 @@
     emit(%(event_enum_value)s, qmp, &local_err);
 
 """,
-                 event_enum_value = event_enum_value)
+                 event_enum_value = c_enum_const(event_enum_name, event_name))
 
     # step 5: clean up
     if params:
@@ -223,7 +223,6 @@
         fdecl.write(ret)
 
         # We need an enum value per event
-        event_enum_value = c_enum_const(event_enum_name, event_name)
         ret = generate_event_implement(api_name, event_name, params)
         fdef.write(ret)