Fix for

[ 587875 ] crash on deleting extended slice

The array code got simpler, always a good thing!
diff --git a/Lib/test/test_array.py b/Lib/test/test_array.py
index 023af9a..b650033 100755
--- a/Lib/test/test_array.py
+++ b/Lib/test/test_array.py
@@ -336,6 +336,9 @@
         a = array.array(type, range(5))
         del a[1::-2]
         vereq(a, array.array(type, [0,2,3,4]))
+        a = array.array(type, range(10))
+        del a[::1000]
+        vereq(a, array.array(type, [1,2,3,4,5,6,7,8,9]))
         #  assignment
         a = array.array(type, range(10))
         a[::2] = array.array(type, [-1]*5)