pkg/tlsf: fix double pointer.

A (void*) function was declared as (void**) because one of the void pointers
was hidden behind a typedef. Because of the way a void* works, this has no
consequences, but it is confusing.

pkg/tlsf/contrib/include/tlsf-malloc.h

@@ -86,7 +86,7 @@ int tlsf_add_global_pool(void *mem, size_t bytes);
  *
  * Use for debugging purposes only.
  */
-tlsf_t *_tlsf_get_global_control(void);
+tlsf_t _tlsf_get_global_control(void);
 
 
 #ifdef __cplusplus

pkg/tlsf/contrib/tlsf-malloc.c

@@ -60,7 +60,7 @@ int tlsf_add_global_pool(void *mem, size_t bytes)
     }
 }
 
-tlsf_t *_tlsf_get_global_control(void)
+tlsf_t _tlsf_get_global_control(void)
 {
     return gheap;
 }