update StressTransform for non-array arguments
update StressTransform for non-array arguments

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