Fix Attachable for those poor fellows who don't have the bliss of SafeHtml enabled (yet).

Review at http://gwt-code-reviews.appspot.com/1426808

Review by: rjrjr@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10119 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/uibinder/rebind/UiBinderWriter.java b/user/src/com/google/gwt/uibinder/rebind/UiBinderWriter.java
index 3846bd0..f0fd59b 100644
--- a/user/src/com/google/gwt/uibinder/rebind/UiBinderWriter.java
+++ b/user/src/com/google/gwt/uibinder/rebind/UiBinderWriter.java
@@ -792,7 +792,7 @@
    */
   public String tokenForSafeHtmlExpression(String expression) {
     if (!useSafeHtmlTemplates) {
-      return tokenForStringExpression(expression);
+      return tokenForStringExpression(expression + ".asString()");
     }
 
     String token = tokenator.nextToken(expression);