fix(mouse): statusline click registered as statuscolumn (#21748)

fix(statuscolumn): statusline click registered as statuscolumn

Problem:  Status line click is registered as status status column click.
Solution: Check that mouse is not on the status line.

Resolve https://github.com/luukvbaal/statuscol.nvim/issues/4.

src/nvim/mouse.c

@@ -1110,7 +1110,7 @@ retnomove:
     ? wp->w_winbar_height != 0
     : false;
 
-  on_statuscol = (grid == (col < win_col_off(wp)))
+  on_statuscol = !on_status_line && !on_winbar && col < win_col_off(wp)
     ? *wp->w_p_stc != NUL
     : false;