Fix double delete bug.
Fix double delete bug.

rohit12/opencog,cosmoharrigan/opencog,williampma/atomspace,Allend575/opencog,ruiting/opencog,ceefour/opencog,tim777z/opencog,MarcosPividori/atomspace,shujingke/opencog,zhaozengguang/opencog,andre-senna/opencog,kinoc/opencog,roselleebarle04/opencog,rodsol/atomspace,roselleebarle04/opencog,misgeatgit/atomspace,printedheart/atomspace,jswiergo/atomspace,cosmoharrigan/atomspace,TheNameIsNigel/opencog,virneo/opencog,rohit12/opencog,tim777z/opencog,eddiemonroe/atomspace,kim135797531/opencog,ceefour/atomspace,shujingke/opencog,kim135797531/opencog,misgeatgit/opencog,ceefour/atomspace,MarcosPividori/atomspace,williampma/opencog,Allend575/opencog,kim135797531/opencog,prateeksaxena2809/opencog,zhaozengguang/opencog,kim135797531/opencog,printedheart/atomspace,ArvinPan/atomspace,MarcosPividori/atomspace,sanuj/opencog,rodsol/opencog,anitzkin/opencog,rodsol/atomspace,printedheart/opencog,ArvinPan/atomspace,iAMr00t/opencog,rohit12/opencog,Selameab/opencog,tim777z/opencog,Selameab/atomspace,virneo/atomspace,anitzkin/opencog,eddiemonroe/atomspace,cosmoharrigan/opencog,roselleebarle04/opencog,anitzkin/opencog,ArvinPan/atomspace,eddiemonroe/opencog,yantrabuddhi/opencog,prateeksaxena2809/opencog,cosmoharrigan/atomspace,iAMr00t/opencog,Allend575/opencog,printedheart/atomspace,gavrieltal/opencog,eddiemonroe/opencog,sanuj/opencog,gaapt/opencog,jlegendary/opencog,ceefour/opencog,ruiting/opencog,prateeksaxena2809/opencog,rTreutlein/atomspace,Allend575/opencog,rohit12/atomspace,gaapt/opencog,eddiemonroe/atomspace,anitzkin/opencog,inflector/opencog,andre-senna/opencog,inflector/atomspace,misgeatgit/opencog,AmeBel/atomspace,iAMr00t/opencog,sumitsourabh/opencog,kim135797531/opencog,rTreutlein/atomspace,andre-senna/opencog,tim777z/opencog,misgeatgit/opencog,Selameab/atomspace,misgeatgit/atomspace,Selameab/opencog,printedheart/opencog,Allend575/opencog,yantrabuddhi/atomspace,Tiggels/opencog,kinoc/opencog,inflector/atomspace,TheNameIsNigel/opencog,yantrabuddhi/opencog,misgeatgit/atomspace,Tiggels/opencog,jlegendary/opencog,jlegendary/opencog,Selameab/atomspace,inflector/opencog,kinoc/opencog,ruiting/opencog,tim777z/opencog,sumitsourabh/opencog,prateeksaxena2809/opencog,kinoc/opencog,AmeBel/atomspace,ruiting/opencog,gavrieltal/opencog,rodsol/opencog,kim135797531/opencog,rohit12/atomspace,MarcosPividori/atomspace,rohit12/atomspace,tim777z/opencog,anitzkin/opencog,iAMr00t/opencog,Tiggels/opencog,zhaozengguang/opencog,williampma/opencog,shujingke/opencog,misgeatgit/opencog,Selameab/atomspace,cosmoharrigan/opencog,roselleebarle04/opencog,sanuj/opencog,virneo/opencog,ruiting/opencog,zhaozengguang/opencog,rohit12/opencog,Tiggels/opencog,ArvinPan/opencog,Allend575/opencog,Selameab/opencog,jlegendary/opencog,gaapt/opencog,inflector/opencog,sumitsourabh/opencog,sumitsourabh/opencog,Tiggels/opencog,iAMr00t/opencog,inflector/atomspace,printedheart/atomspace,roselleebarle04/opencog,gavrieltal/opencog,cosmoharrigan/opencog,yantrabuddhi/opencog,Selameab/opencog,AmeBel/opencog,ArvinPan/opencog,AmeBel/opencog,williampma/atomspace,printedheart/opencog,rTreutlein/atomspace,cosmoharrigan/opencog,TheNameIsNigel/opencog,misgeatgit/atomspace,rodsol/atomspace,shujingke/opencog,gavrieltal/opencog,sumitsourabh/opencog,ceefour/opencog,inflector/opencog,eddiemonroe/opencog,UIKit0/atomspace,sanuj/opencog,jlegendary/opencog,eddiemonroe/atomspace,eddiemonroe/opencog,AmeBel/opencog,rohit12/opencog,jswiergo/atomspace,AmeBel/atomspace,virneo/atomspace,jswiergo/atomspace,ceefour/opencog,inflector/opencog,TheNameIsNigel/opencog,iAMr00t/opencog,anitzkin/opencog,Allend575/opencog,rodsol/opencog,inflector/opencog,ceefour/opencog,ArvinPan/atomspace,ArvinPan/opencog,ArvinPan/opencog,andre-senna/opencog,gavrieltal/opencog,jlegendary/opencog,gaapt/opencog,printedheart/opencog,ruiting/opencog,williampma/opencog,inflector/opencog,UIKit0/atomspace,AmeBel/opencog,ceefour/opencog,Selameab/opencog,zhaozengguang/opencog,williampma/opencog,williampma/atomspace,virneo/opencog,sumitsourabh/opencog,roselleebarle04/opencog,inflector/atomspace,eddiemonroe/opencog,yantrabuddhi/opencog,AmeBel/opencog,shujingke/opencog,ArvinPan/opencog,misgeatgit/opencog,AmeBel/atomspace,ceefour/atomspace,AmeBel/atomspace,TheNameIsNigel/opencog,anitzkin/opencog,sanuj/opencog,rTreutlein/atomspace,rohit12/opencog,rodsol/opencog,andre-senna/opencog,kim135797531/opencog,ArvinPan/opencog,Tiggels/opencog,cosmoharrigan/atomspace,yantrabuddhi/atomspace,printedheart/opencog,eddiemonroe/opencog,virneo/opencog,misgeatgit/atomspace,TheNameIsNigel/opencog,rodsol/opencog,Selameab/opencog,prateeksaxena2809/opencog,cosmoharrigan/atomspace,prateeksaxena2809/opencog,rohit12/atomspace,jswiergo/atomspace,kinoc/opencog,sumitsourabh/opencog,gaapt/opencog,virneo/atomspace,ruiting/opencog,shujingke/opencog,virneo/opencog,rodsol/atomspace,gavrieltal/opencog,UIKit0/atomspace,gaapt/opencog,virneo/opencog,kinoc/opencog,williampma/opencog,yantrabuddhi/atomspace,printedheart/opencog,ceefour/opencog,yantrabuddhi/opencog,rTreutlein/atomspace,andre-senna/opencog,misgeatgit/opencog,sanuj/opencog,misgeatgit/opencog,gavrieltal/opencog,eddiemonroe/atomspace,yantrabuddhi/opencog,zhaozengguang/opencog,ceefour/atomspace,eddiemonroe/opencog,virneo/opencog,yantrabuddhi/opencog,williampma/opencog,gaapt/opencog,yantrabuddhi/atomspace,inflector/opencog,kinoc/opencog,AmeBel/opencog,yantrabuddhi/atomspace,rodsol/opencog,misgeatgit/opencog,UIKit0/atomspace,prateeksaxena2809/opencog,williampma/atomspace,shujingke/opencog,cosmoharrigan/opencog,AmeBel/opencog,virneo/atomspace,misgeatgit/opencog,jlegendary/opencog,inflector/atomspace,roselleebarle04/opencog,andre-senna/opencog