patch 9.1.0077: Unnecessary call to redraw_for_cursorline() in nv_mousescroll()

Problem:  The call to redraw_for_cursorline() in nv_mousescroll() is
          unnecessary because redraw_for_cursorline() only sets redraw
          type to UPD_VALID, and all code paths in do_mousescroll()
          already set redraw type to at least UPD_VALID.
Solution: Remove call to redraw_for_cursorline() in nv_mousescroll().
          (zeertzjq)

closes: #13979

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/move.c b/src/move.c
index 5d2fece..9ea24c8 100644
--- a/src/move.c
+++ b/src/move.c
@@ -19,6 +19,7 @@
 
 #include "vim.h"
 
+static void redraw_for_cursorline(win_T *wp);
 static int scrolljump_value(void);
 static int check_top_offset(void);
 static void curs_rows(win_T *wp);
@@ -155,7 +156,7 @@
  * Redraw when w_cline_row changes and 'relativenumber' or 'cursorline' is
  * set.
  */
-    void
+    static void
 redraw_for_cursorline(win_T *wp)
 {
     if ((wp->w_p_rnu