Changed a variable declaration to top of block
Changed a variable declaration to top of block
Merge pull request #1571 from bggd/patch-1

Changed a variable declaration to top of block
remove unnecessary jump
remove possible free-after-realloc problem; close #1570
fix length check in read_section_debug(); fix #1572
Merge pull request #1573 from Fleurer/fix1572

fix length check in read_section_debug()
remove warning on NAN_BOXING
enum mrb_vtype varies on compile time configuration, namely MRB_NAN_BOXING