qapi: add c_fun to escape function names

Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index 54117d4..78c947c 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -129,9 +129,9 @@
         break;
 ''',
                 abbrev = de_camel_case(name).upper(),
-                enum = de_camel_case(key).upper(),
+                enum = c_fun(de_camel_case(key)).upper(),
                 c_type=members[key],
-                c_name=c_var(key))
+                c_name=c_fun(key))
 
     ret += mcgen('''
     default: