[PATCH] vinyl: rename vy_read_view_merge argument from hint to prev_tuple

[Vladimir Davydov]

On Tue, Apr 02, 2019 at 08:06:17PM +0300, Vladimir Davydov wrote:
> So as not to confuse it with a tuple comparison hint.
> ---
>  src/box/vy_write_iterator.c | 25 +++++++++++++------------
>  1 file changed, 13 insertions(+), 12 deletions(-)

Trivial, pushed to master.