fix TLMembraneTerm.describe_membrane_geometry()
fix TLMembraneTerm.describe_membrane_geometry()

lokik/sfepy,rc/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,sfepy/sfepy,vlukes/sfepy,lokik/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,lokik/sfepy,BubuLK/sfepy,sfepy/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,rc/sfepy,lokik/sfepy