qapi-event: Eliminate global variable event_enum_value

Backports commit 7b24626cd019ed5084c8e3370999176a1ebd44be from qemu

qemu/scripts/qapi-event.py

@@ -137,7 +137,7 @@ def generate_event_implement(api_name, event_name, params):
     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:
@@ -222,7 +222,6 @@ for expr in exprs:
         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)
 

qemu/scripts/qapi.py

@@ -1506,6 +1506,9 @@ const char *const %(name)s_lookup[] = {
 ''',
                      index = index, value = value)
 
+    # Unicorn: We don't use C99 [ARRAY_INDICING] = Thing because
+    # MSVC is still in the stone-age with this part of C compiler
+    # support.
     max_index = c_enum_const(name, 'MAX', prefix)
     ret += mcgen('''
     NULL,