Fix handling of mouse events on header line with tab-line

* src/window.c (coordinates_in_window): Fix conditions for
coordinates being on the window's header line when that
window also displays a tab-line.  (Bug#37807)

1 files changed, 4 insertions, 2 deletions

diff --git a/src/window.c b/src/window.c
index e4bb2daeb38..0fa0bdf7b92 100644
--- a/src/window.c
+++ b/src/window.c
@@ -1321,8 +1321,10 @@ coordinates_in_window (register struct window *w, int x, int y)
                && y < top_y + CURRENT_TAB_LINE_HEIGHT (w)
                && (part = ON_TAB_LINE))
            || (window_wants_header_line (w)
-               && y < top_y + CURRENT_TAB_LINE_HEIGHT (w)
-                            + CURRENT_HEADER_LINE_HEIGHT (w)
+               && y < top_y + CURRENT_HEADER_LINE_HEIGHT (w)
+               + (window_wants_tab_line (w)
+                  ? CURRENT_TAB_LINE_HEIGHT (w)
+                  : 0)
                && (part = ON_HEADER_LINE)))
     {
       /* If it's under/over the scroll bar portion of the mode/header