Change writer_func arg description in MIR_write_with_func.
* API functions `MIR_write (MIR_context_t ctx, FILE *f)` and
`MIR_read (MIR_context_t ctx, FILE *f)` outputs and reads
**binary MIR representation** to/from given file. There are also
- functions `MIR_write_with_func (MIR_context_t ctx, const void
+ functions `MIR_write_with_func (MIR_context_t ctx, const int
(*writer_func) (MIR_context_t, uint8_t))` and `MIR_read_with_func
(MIR_context_t ctx, const int (*reader_func) (MIR_context_t))` to
output and read **binary MIR representation** through a function
given as an argument. The reader function should return EOF as
- the end of the binary MIR representation.
+ the end of the binary MIR representation, the writer function
+ should be return the number of sucessfully output bytes
* Binary MIR representation much more compact and faster to read than textual one
## MIR data type
