fix to_poly_file() in geom_tools.py
fix to_poly_file() in geom_tools.py

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