ffi: correct treatment of (ptr buf).

The buf FFI type's alloc virtual should return a pointer to
the buffer's pointer, not the buffer itself.
What's currently going on is something silly, whereby
the pointer to the buffer is stored into the buffer
itself.

* buf.c (buf_addr_of): New function.

* buf.c (buf_addr_of): Declared.

* ffi.c (ffi_buf_alloc): Use buf_addr_of instead of buf_get.

1 files changed, 1 insertions, 0 deletions

diff --git a/buf.h b/buf.h
index 8102fff8..b65f7037 100644
--- a/buf.h
+++ b/buf.h
@@ -32,6 +32,7 @@ val buf_trim(val buf);
 val buf_set_length(val obj, val len, val init_val);
 val length_buf(val buf);
 mem_t *buf_get(val buf, val self);
+mem_t **buf_addr_of(val buf, val self);
 void buf_fill(val buf, mem_t *src, val self);
 
 #if HAVE_I8