Fix handling of documented enum parameters

Previously this would crash the code generator.

Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>

src/c_client.py

@@ -2266,13 +2266,13 @@ def _c_request_helper(self, name, void, regular, aux=False, reply_fds=False):
             elif base_func_name == 'xcb_create_window' and field.c_field_name == 'value_mask':
                 field.enum = 'CW'
             if field.enum:
-                # XXX: why the 'xcb' prefix?
-                key = ('xcb', field.enum)
+                assert 2 <= len(self.name) <= 3
+                key = (*self.name[:-1], field.enum)
 
                 tname = _t(key)
                 if namecount[tname] > 1:
                     tname = _t(key + ('enum',))
-                _h(' * @param %s A bitmask of #%s values.' % (field.c_field_name, tname))
+                _h(' * @param %s A bitmask of #%s values.', field.c_field_name, tname)
 
             if self.doc and field.field_name in self.doc.fields:
                 desc = self.doc.fields[field.field_name]
@@ -2280,7 +2280,8 @@ def _c_request_helper(self, name, void, regular, aux=False, reply_fds=False):
                     desc = desc.replace('`%s`' % name, '\\a %s' % (name))
                 desc = desc.split("\n")
                 desc = [line if line != '' else '\\n' for line in desc]
-                _h(' * @param %s %s' % (field.c_field_name, "\n * ".join(desc)))
+                _h(' * @param %s %s', field.c_field_name, "\n * ".join(desc))
+
             # If there is no documentation yet, we simply don't generate an
             # @param tag. Doxygen will then warn about missing documentation.