patch 9.1.0184: Cursor pos wrong when clicking with conceal and wrap

Problem:  Cursor position wrong when clicking with conceal and wrap.
Solution: Use the virtual column of the last char for ScreenCols[] in
          boguscols.  Remove use of MAXCOL in ScreenCols[].  Rename
          third argument of wlv_screen_line() to "clear_end" as that's
          clearer what it does (zeertzjq).

related: 14192
closes: #14200

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index 53937d3..cf7cd95 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -7,7 +7,7 @@
 size_t fill_foldcolumn(char_u *p, win_T *wp, int closed, linenr_T lnum);
 int screen_get_current_line_off(void);
 void reset_screen_attr(void);
-void screen_line(win_T *wp, int row, int coloff, int endcol, int clear_width, int flags);
+void screen_line(win_T *wp, int row, int coloff, int endcol, int clear_width, colnr_T last_vcol, int flags);
 void rl_mirror(char_u *str);
 void draw_vsep_win(win_T *wp, int row);
 int stl_connected(win_T *wp);