patch 9.1.0294: Text height function does not respect it's argument

Problem:  plines_m_win() does not take into account it's "limit_winheight"
          argument for filler lines below the last line of the buffer.
          (after v9.1.0280)
Solution: Check window height when "limit_winheight" is TRUE.
          (Luuk van Baal)

closes: #14449

Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/move.c b/src/move.c
index 9853b0b..8c6fbd6 100644
--- a/src/move.c
+++ b/src/move.c
@@ -3210,7 +3210,7 @@
 	{
 	    int n = plines_correct_topline(curwin, curwin->w_topline, FALSE);
 	    if (n - count < curwin->w_height && curwin->w_topline < buflen)
-		n += plines_m_win(curwin, curwin->w_topline + 1, buflen, TRUE);
+		n += plines_m_win(curwin, curwin->w_topline + 1, buflen, FALSE);
 	    if (n - count < curwin->w_height)
 		count = n - curwin->w_height;
 	}