lib/array: fix AbstractArray::unshift

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/standard/collection/array.nit b/lib/standard/collection/array.nit
index 988ddbf..558f7c1 100644 (file)
--- a/lib/standard/collection/array.nit
+++ b/lib/standard/collection/array.nit
@@ -176,7 +176,7 @@ abstract class AbstractArray[E]
        redef fun unshift(item)
        do
                var i = length - 1
-               while i > 0 do
+               while i >= 0 do
                        self[i+1] = self[i]
                        i -= 1
                end