Adds ‘class_need_extend’ section. If the class isn’t in this list, don’t generate ‘ctor’ method.
Check ‘initializing’ variable in JS.
Merge pull request #50 from dumganhar/dont-generate-ctor-if-not-specify

Adds ‘class_need_extend’ section. If the class isn’t in this list, don’t generate ‘ctor’ method.