-int sr_filter_probes(int in_unitsize, int out_unitsize, int *probelist,
- const char *data_in, uint64_t length_in, char **data_out,
- uint64_t *length_out);
+int sr_filter_probes(int in_unitsize, int out_unitsize, const int *probelist,
+ const unsigned char *data_in, uint64_t length_in,
+ char **data_out, uint64_t *length_out);