lib/core: fix `List::clear` not setting `length` to 0

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/core/collection/list.nit b/lib/core/collection/list.nit
index 4516703..ab81a37 100644 (file)
--- a/lib/core/collection/list.nit
+++ b/lib/core/collection/list.nit
@@ -186,6 +186,7 @@ class List[E]
        do
                _head = null
                _tail = null
+               length = 0
        end