fix check for region parents
fix check for region parents

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