Fix declaration of malloc_usable_size()
The function should take a 'const void*' parameter, instead of 'void*'.
Note that the implementation in upstream-dlmalloc/malloc.c already does
this.
For context, see http://b.android.com/55725
Change-Id: Iefd55cdb8996699189e0545f9195972490306227
diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index 8875e54..eaedc49 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -33,7 +33,7 @@
extern void free(void* p);
extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur;
-extern size_t malloc_usable_size(void* p);
+extern size_t malloc_usable_size(const void* p);
extern void* valloc(size_t byte_count) __mallocfunc __wur;
extern void* pvalloc(size_t byte_count) __mallocfunc __wur;