[MERGE #3835 @boingoing] Fix null dereference in LoadAllConstants when code has no 'this' binding
[MERGE #3835 @boingoing] Fix null dereference in LoadAllConstants when code has no 'this' binding

Merge pull request #3835 from boingoing:FixEventHandlerThisBinding

Fixes https://microsoft.visualstudio.com/DefaultCollection/OS/_workitems?id=13977382&_a=edit

mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore