patch 9.1.0014: incorrect use of W_WINROW in edit.c

Problem:  incorrect use of W_WINROW in edit.c
Solution: compare against curwin->w_height instead

Remove incorrect use of W_WINROW

In structs.h it is mentioned that w_wrow is relative to w_winrow, so
using W_WINROW doesn't make sense when comparing with window height.

This change won't lead to any observable behavior change:

The condition intends to check if there are 'scrolloff' lines between
the current cursor when the bottom of the window. When W_WINROW(curwin)
is added to curwin->w_height - 1 - get_scrolloff_value(), the condition
is instead satisfied when the cursor is on some screen line below that
position. However,
- If 'scrolloff' is smaller than half the window height, this condition
  can only be satisfied when W_WINROW(curwin) == 0. And if it is not
  satisfied, update_topline() does the actual scrolling.
- If 'scrolloff' is larger than half the window height, update_topline()
  will put the cursor at the center of the window soon afterwards
  anyway, because set_topline() now unsets VALID_TOPLINE flag starting
  from 7db7bb45b0.

To put it in another way, 7db7bb45b0
makes the update_topline() just below correct the mistakes made in this
block, so this incorrect use of W_WINROW() no longer affects observable
behavior.

closes: #12331

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    14,
 /**/
     13,
 /**/