Fix: Corrected type

src/prng.c

@@ -74,7 +74,7 @@ typedef struct {
     size_t bufferlen;
 } igloo_prng_buffer_extra_t;
 
-static inline void buffer_extra_init(igloo_prng_buffer_extra_t *extra, const char *instance)
+static inline void buffer_extra_init(igloo_prng_buffer_extra_t *extra, const void *instance)
 {
     igloo_error_t error;