* edit.c (edit_push_action): Fix access to uninitialized memory.

Found by Valgrind.

edit/ChangeLog

@@ -1,3 +1,8 @@
+2002-08-02  Paul Sheer  <psheer@icon.co.za>
+
+	* edit.c (edit_push_action): Fix access to uninitialized memory.
+	Found by Valgrind.
+
 2002-08-01  Pavel Roskin  <proski@gnu.org>
 
 	* syntax.c: Remove all references to MAD.

edit/edit.c

@@ -715,7 +715,9 @@ void edit_push_action (WEdit * edit, long c,...)
 	va_end (ap);
     } else
 #endif				/* ! FAST_MOVE_CURSOR */
-    if (spm1 != edit->stack_bottom && ((sp - 2) & edit->stack_size_mask) != edit->stack_bottom) {
+    if (edit->stack_bottom != sp
+	&& spm1 != edit->stack_bottom
+	&& ((sp - 2) & edit->stack_size_mask) != edit->stack_bottom) {
 	int d;
 	if (edit->undo_stack[spm1] < 0) {
 	    d = edit->undo_stack[(sp - 2) & edit->stack_size_mask];