Fix class name default to be orderable

python/dune/perftool/cgen/clazz.py

@@ -34,7 +34,7 @@ class BaseClass(Generable):
 
 
 class ClassMember(Generable):
-    def __init__(self, member, access=AccessModifier.PUBLIC, name=None):
+    def __init__(self, member, access=AccessModifier.PUBLIC, name=""):
         self.member = member
         self.access = access
         self.name = name