go up on fist line should not reset the desired column

lib/ace/selection_test.js

@@ -388,6 +388,18 @@ module.exports = {
         selection.moveCursorDown();
 
         assert.position(selection.getCursor(), 0, 12);
+    },
+    
+    "test go line up twice and then once down when in the second should go back to the previous column": function() {
+        var session = new EditSession("juhu\nkinners");
+        var selection = session.getSelection();
+        
+        selection.moveCursorTo(1, 4);
+        selection.moveCursorUp();
+        selection.moveCursorUp();
+        selection.moveCursorDown();
+
+        assert.position(selection.getCursor(), 1, 4);
     }
 };