Fix the issue for name confliction between two used traits. - When a class use two or more traits, and the name of a method from one trait conflicts with an attribute from another one, composite will be fault for setting method proxys. - Solution is to skip attributes that is not callable when setting proxys.

# -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
# vim: sw=4:ts=8:sts=4
m4datadir = $(datadir)/mb
dist_m4data_DATA = foreach.m4 mb_c_header.m4 mb_c_source.m4
dist_bin_SCRIPTS = svg2code.py