VLC_EXPORT( block_t *, block_Alloc, ( size_t ) );
VLC_EXPORT( block_t *, block_Realloc, ( block_t *, ssize_t i_pre, size_t i_body ) );
VLC_EXPORT( block_t *, block_Alloc, ( size_t ) );
VLC_EXPORT( block_t *, block_Realloc, ( block_t *, ssize_t i_pre, size_t i_body ) );