ob: more adjustments for new list handling

* lisp/ob-ref.el (org-babel-ref-at-ref-p): Only try to read results as
  a list if at the *beginning* of a list item.
* lisp/ob.el (org-babel-read-result): Only try to read results as a
  list if at the *beginning* of a list item.

lisp/ob-ref.el

@@ -217,7 +217,7 @@ to \"0:-1\"."
 Return nil if none of the supported reference types are found.
 Supported reference types are tables and source blocks."
   (cond ((org-at-table-p) 'table)
-	((org-in-item-p) 'list)
+	((org-at-item-p) 'list)
         ((looking-at "^[ \t]*#\\+BEGIN_SRC") 'source-block)
         ((looking-at org-bracket-link-regexp) 'file)
         ((looking-at org-babel-result-regexp) 'results-line)))

lisp/ob.el

@@ -1363,7 +1363,7 @@ following the source block."
   (let ((case-fold-search t) result-string)
     (cond
      ((org-at-table-p) (org-babel-read-table))
-     ((org-in-item-p) (org-babel-read-list))
+     ((org-at-item-p) (org-babel-read-list))
      ((looking-at org-bracket-link-regexp) (org-babel-read-link))
      ((looking-at org-block-regexp) (org-babel-trim (match-string 4)))
      ((looking-at "^[ \t]*: ")