When we shortly expose all feature names to code, it will be valid to
include a '-', which must be translated to a '_' for the enum constants.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 scripts/qapi/gen.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py
index 6a8abe0041..c53ca72950 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -24,6 +24,7 @@
 )
 
 from .common import (
+    c_enum_const,
     c_fname,
     c_name,
     guardend,
@@ -41,7 +42,7 @@
 
 
 def gen_special_features(features: Sequence[QAPISchemaFeature]) -> str:
-    special_features = [f"1u << QAPI_{feat.name.upper()}"
+    special_features = [f"1u << {c_enum_const('qapi', feat.name)}"
                         for feat in features if feat.is_special()]
     return ' | '.join(special_features) or '0'
 
-- 
2.46.0