fix term evaluation with complex variables
fix term evaluation with complex variables

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