Fix data loss warning.
Fixes:
```
itkzlib-ng/inflate.c(1209,24): warning C4267: '=': conversion from 'size_t' to 'unsigned long', possible loss of data
itkzlib-ng/inflate.c(1210,26): warning C4267: '=': conversion from 'size_t' to 'unsigned long', possible loss of data
```
in = strm->total_in;
out = strm->total_out;
PREFIX(inflateReset)(strm);
- strm->total_in = in;
- strm->total_out = out;
+ strm->total_in = (z_size_t)in;
+ strm->total_out = (z_size_t)out;
state->flags = flags;
state->mode = TYPE;
return Z_OK;