(redisplay_tool_bar): Handle large tool-bar-border values.

diff --git a/src/xdisp.c b/src/xdisp.c
index 984980324b0749690aac1e09faa0e61623569693..c0caaf4daf22ee0ec050e075ed37ec05363a914c 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -9723,7 +9723,7 @@ redisplay_tool_bar (f)
        border = 0;
 
       rows = f->n_tool_bar_rows;
-      height = (it.last_visible_y - border) / rows;
+      height = max (1, (it.last_visible_y - border) / rows);
       extra = it.last_visible_y - border - height * rows;
 
       while (it.current_y < it.last_visible_y)