should use mrb_type() for the sake of MRB_WORD_BOXING
Remove unnecessary newline in `OP_GETGLOBAL` codedump.
fix overflow error like #2244 on MRB_WORD_BOXING
Merge pull request #2246 from take-cheeze/fix_codedump

Remove unnecessary newline in `OP_GETGLOBAL` codedump.