Add "captcha_protect_form" event that the recaptcha module grabs and

uses to add a captcha to the end of the first group in the form.  If
there are no groups, it adds the captcha at the end of the form.
Updated user_profile and comment forms to use it.

modules/comment/helpers/comment.php

@@ -45,6 +45,7 @@ static function get_add_form($item) {
       ->error_messages("required", t("You must enter a comment"));
     $group->hidden("item_id")->value($item->id);
     module::event("comment_add_form", $form);
+    module::event("captcha_protect_form", $form);
     $group->submit("")->value(t("Add"))->class("ui-state-default ui-corner-all");
 
     return $form;

modules/gallery/helpers/user_profile.php

@@ -48,6 +48,7 @@ static function get_contact_form($user) {
       ->rules("required")
       ->error_messages("required", t("You must enter a message"));
     module::event("user_profile_contact_form", $form);
+    module::event("captcha_protect_form", $form);
     $group->submit("")->value(t("Send"));
     return $form;
   }

modules/recaptcha/helpers/recaptcha_event.php

@@ -18,21 +18,17 @@
  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
  */
 class recaptcha_event_Core {
-  static function user_profile_contact_form($form) {
+  static function captcha_protect_form($form) {
     if (module::get_var("recaptcha", "public_key")) {
-      $form->message->recaptcha("recaptcha")->label("")->id("g-recaptcha");
-    }
-  }
+      foreach ($form->inputs as $input) {
+        if ($input instanceof Form_Group) {
+          $input->recaptcha("recaptcha")->label("")->id("g-recaptcha");
+          return;
+        }
+      }
 
-  static function comment_add_form($form) {
-    if (module::get_var("recaptcha", "public_key")) {
-      $form->add_comment->recaptcha("recaptcha")->label("")->id("g-recaptcha");
-    }
-  }
-
-  static function register_add_form($form) {
-    if (module::get_var("recaptcha", "public_key")) {
-      $form->register_user->recaptcha("recaptcha")->label("")->id("g-recaptcha");
+      // If we haven't returned yet, then add the captcha at the end of the form
+      $form->recaptcha("recaptcha")->label("")->id("g-recaptcha");
     }
   }