bug fix triggered by stanford compat algs
bug fix triggered by stanford compat algs

ainishdave/relex,virneo/relex,opencog/relex,opencog/relex,ainishdave/relex,leungmanhin/relex,anitzkin/relex,rodsol/relex-temp,rodsol/relex-temp,linas/relex,opencog/relex,linas/relex,leungmanhin/relex,anitzkin/relex,linas/relex,ainishdave/relex,rodsol/relex,AmeBel/relex,anitzkin/relex,rodsol/relex-temp,williampma/relex,rodsol/relex,AmeBel/relex,AmeBel/relex,rodsol/relex,rodsol/relex,virneo/relex,williampma/relex,anitzkin/relex,virneo/relex,rodsol/relex-temp,virneo/relex,rodsol/relex-temp,ainishdave/relex,williampma/relex,leungmanhin/relex,williampma/relex,anitzkin/relex