update LCBCOperators.make_global_operator() for rhs without column variable
update LCBCOperators.make_global_operator() for rhs without column variable

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