[PATCH v5 07/15] qapi/introspect.py: Always define all 'extra' dict keys

[John Snow <jsnow@redhat.com>]

This mimics how a typed object works, where 'if' and 'comment' are
always set, regardless of if they have a value set or not.

It is safe to do this because of the way that _tree_to_qlit processes
these values (using dict.get with a default of None), resulting in no
change of output from _tree_to_qlit. There are no other users of this
data.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/qapi/introspect.py | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/scripts/qapi/introspect.py b/scripts/qapi/introspect.py
index 1655a21f85b..45231d2abc3 100644
--- a/scripts/qapi/introspect.py
+++ b/scripts/qapi/introspect.py
@@ -27,11 +27,10 @@
 
 
 def _make_tree(obj, ifcond, comment=None):
-    extra = {}
-    if ifcond:
-        extra['if'] = ifcond
-    if comment:
-        extra['comment'] = comment
+    extra = {
+        'if': ifcond,
+        'comment': comment
+    }
     return (obj, extra)
 
 
-- 
2.29.2