Fix NULL deref in duk_is_fixed/dynamic_buffer()
Fix NULL deref in duk_is_fixed/dynamic_buffer()

jmptrader/duktape,markand/duktape,thurday/duktape,markand/duktape,haosu1987/duktape,thurday/duktape,nivertech/duktape,thurday/duktape,skomski/duktape,svaarala/duktape,svaarala/duktape,svaarala/duktape,kphillisjr/duktape,thurday/duktape,harold-b/duktape,harold-b/duktape,skomski/duktape,eddieh/duktape,chenyaqiuqiu/duktape,haosu1987/duktape,zeropool/duktape,reqshark/duktape,chenyaqiuqiu/duktape,sloth4413/duktape,reqshark/duktape,kphillisjr/duktape,jmptrader/duktape,kphillisjr/duktape,jmptrader/duktape,sloth4413/duktape,reqshark/duktape,markand/duktape,nivertech/duktape,nivertech/duktape,harold-b/duktape,tassmjau/duktape,haosu1987/duktape,jmptrader/duktape,haosu1987/duktape,eddieh/duktape,skomski/duktape,nivertech/duktape,jmptrader/duktape,zeropool/duktape,markand/duktape,kphillisjr/duktape,markand/duktape,chenyaqiuqiu/duktape,sloth4413/duktape,sloth4413/duktape,jmptrader/duktape,skomski/duktape,svaarala/duktape,zeropool/duktape,kphillisjr/duktape,markand/duktape,jmptrader/duktape,skomski/duktape,kphillisjr/duktape,harold-b/duktape,harold-b/duktape,tassmjau/duktape,svaarala/duktape,chenyaqiuqiu/duktape,haosu1987/duktape,kphillisjr/duktape,eddieh/duktape,eddieh/duktape,skomski/duktape,zeropool/duktape,nivertech/duktape,sloth4413/duktape,reqshark/duktape,svaarala/duktape,zeropool/duktape,sloth4413/duktape,jmptrader/duktape,harold-b/duktape,haosu1987/duktape,zeropool/duktape,harold-b/duktape,harold-b/duktape,markand/duktape,chenyaqiuqiu/duktape,thurday/duktape,thurday/duktape,chenyaqiuqiu/duktape,kphillisjr/duktape,tassmjau/duktape,jmptrader/duktape,eddieh/duktape,skomski/duktape,zeropool/duktape,sloth4413/duktape,nivertech/duktape,sloth4413/duktape,haosu1987/duktape,tassmjau/duktape,haosu1987/duktape,reqshark/duktape,chenyaqiuqiu/duktape,thurday/duktape,tassmjau/duktape,chenyaqiuqiu/duktape,zeropool/duktape,jmptrader/duktape,sloth4413/duktape,eddieh/duktape,reqshark/duktape,skomski/duktape,reqshark/duktape,reqshark/duktape,skomski/duktape,eddieh/duktape,thurday/duktape,markand/duktape,chenyaqiuqiu/duktape,svaarala/duktape,tassmjau/duktape,eddieh/duktape,skomski/duktape,reqshark/duktape,nivertech/duktape,eddieh/duktape,thurday/duktape,reqshark/duktape,nivertech/duktape,svaarala/duktape,haosu1987/duktape,chenyaqiuqiu/duktape,tassmjau/duktape,nivertech/duktape,markand/duktape,zeropool/duktape,zeropool/duktape,eddieh/duktape,tassmjau/duktape,thurday/duktape,kphillisjr/duktape,kphillisjr/duktape,markand/duktape,harold-b/duktape,tassmjau/duktape,svaarala/duktape,sloth4413/duktape,harold-b/duktape,tassmjau/duktape,haosu1987/duktape,nivertech/duktape