Remove bit-field.
New mrb format. The detail is in https://github.com/mruby/mruby/issues/944
Change unsigned char to uint8_t
Fixed to uint8_t
Don't initialize variables that store result as MRB_DUMP_OK. It possibly causes bugs on modifications in the future.
Remove unused substitutions and calculations.
Use type cast not void* but char*. Don't substiture void pointers.
Store to *bin_size if bin_size != NULL.
Clean up code.
Sanity check. As there are implicaton SIZE_MAX >= UINT32_MAX in this code. This assumption may break on some targets which have 16bit memory space.
Don't use int. It decreases portability.   Use size_t as array index and length. It avoids overflow in the extreme situations.
Fix warnings.
Merge pull request #1 from monaka/pr-new-mrb_format

Patches to new_mrb_format
define and use print format macros for mrb_int

For portability: %ld can't be used to print a 64-bit mrb_int on
WIN(32|64) because long is 32-bit wide.
Backtick operation
fix the type of value that is returned by bit-shift expression.
 fix the type of value that is returned by bit-shift expression.
"Ax" is larger than 16-bit.
fix the type of value that is returned by bit-shift expression.
fix comment.