throw instead of a null-pointer deref.
throw instead of a null-pointer deref.

AmeBel/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,inflector/atomspace,yantrabuddhi/atomspace,ArvinPan/atomspace,inflector/atomspace,AmeBel/atomspace,ArvinPan/atomspace,rTreutlein/atomspace,yantrabuddhi/atomspace,AmeBel/atomspace,misgeatgit/atomspace,ArvinPan/atomspace,ArvinPan/atomspace,misgeatgit/atomspace,inflector/atomspace,rTreutlein/atomspace,yantrabuddhi/atomspace,misgeatgit/atomspace,inflector/atomspace,AmeBel/atomspace,rTreutlein/atomspace,yantrabuddhi/atomspace,yantrabuddhi/atomspace,inflector/atomspace,misgeatgit/atomspace,AmeBel/atomspace,misgeatgit/atomspace