Removed assertion for not empty variables list in PM
Removed assertion for not empty variables list in PM

rodsol/atomspace,jswiergo/atomspace,ceefour/atomspace,inflector/atomspace,cosmoharrigan/atomspace,ceefour/atomspace,MarcosPividori/atomspace,rodsol/atomspace,ceefour/atomspace,williampma/atomspace,yantrabuddhi/atomspace,UIKit0/atomspace,ArvinPan/atomspace,AmeBel/atomspace,AmeBel/atomspace,Selameab/atomspace,rohit12/atomspace,rodsol/atomspace,printedheart/atomspace,UIKit0/atomspace,yantrabuddhi/atomspace,yantrabuddhi/atomspace,rTreutlein/atomspace,misgeatgit/atomspace,virneo/atomspace,virneo/atomspace,misgeatgit/atomspace,ArvinPan/atomspace,printedheart/atomspace,rohit12/atomspace,cosmoharrigan/atomspace,williampma/atomspace,inflector/atomspace,ArvinPan/atomspace,Selameab/atomspace,misgeatgit/atomspace,virneo/atomspace,rTreutlein/atomspace,cosmoharrigan/atomspace,inflector/atomspace,rohit12/atomspace,Selameab/atomspace,yantrabuddhi/atomspace,williampma/atomspace,rTreutlein/atomspace,ArvinPan/atomspace,rodsol/atomspace,inflector/atomspace,UIKit0/atomspace,Selameab/atomspace,AmeBel/atomspace,ceefour/atomspace,AmeBel/atomspace,AmeBel/atomspace,misgeatgit/atomspace,printedheart/atomspace,cosmoharrigan/atomspace,misgeatgit/atomspace,rTreutlein/atomspace,MarcosPividori/atomspace,williampma/atomspace,rohit12/atomspace,yantrabuddhi/atomspace,inflector/atomspace,rTreutlein/atomspace,virneo/atomspace,jswiergo/atomspace,jswiergo/atomspace,printedheart/atomspace,MarcosPividori/atomspace,jswiergo/atomspace,MarcosPividori/atomspace,UIKit0/atomspace