free-select segfault

[b]

Gimp 1.1.10 sometimes segfaults when the mouse is moved
above or below the window dureing a free select. I've
attached a patch that seems to fix it. The problem was an
unchecked variable in scan_convert.c. There is a similar but
unrelated problem when the mouse is moved to the left of the
window. I haven't found that bug yet.
Ben

--- scan_convert.c.old  Thu Oct 21 00:24:58 1999
+++ scan_convert.c      Thu Oct 21 00:27:08 1999
@@ -121,8 +121,11 @@
     else
     {
        /* horizontal line */
-       scanlines[y1] = insert_into_sorted_list (scanlines[y1], ROUND (x1));
-       scanlines[y1] = insert_into_sorted_list (scanlines[y1], ROUND (x2));
+        if (y1 >= 0 && y1 < height)
+         {
+           scanlines[y1] = insert_into_sorted_list (scanlines[y1], ROUND (x1));
+           scanlines[y1] = insert_into_sorted_list (scanlines[y1], ROUND (x2));
+         }
     }
 }