Some fixes to avoid notices etc

blocks/html/block_html.php

@@ -9,10 +9,8 @@ function init() {
     }
 
     function specialization() {
-        // Does not check if $this->config or $this->config->title
-        // are empty because if they are then the user wishes the title
-        // of the block to be hidden anyway
-        $this->title = $this->config->title;
+        // We allow empty titles
+        $this->title = isset($this->config->title) ? $this->config->title : '';
     }
 
     function instance_allow_multiple() {
@@ -27,7 +25,7 @@ function get_content() {
         }
 
         $this->content = new stdClass;
-        $this->content->text = $this->config->text;
+        $this->content->text = isset($this->config->text) ? $this->config->text : '';
         $this->content->footer = '';
 
         return $this->content;

blocks/html/config_instance.html

@@ -1,15 +1,19 @@
+<?php $usehtmleditor = can_use_html_editor(); ?>
 <table cellpadding="9" cellspacing="0">
 <tr valign="top">
     <td align="right"><p><?php print_string('configtitle', 'block_html'); ?>:</td>
     <td><input type="text" name="title" size="30" value="<?php echo $this->config->title; ?>" /> (<?php print_string('leaveblanktohide', 'block_html'); ?>)</td>
 </tr>
 <tr valign="top">
     <td align="right"><p><?php print_string('configcontent', 'block_html'); ?>:</td>
-    <td><?php print_textarea(true, 10, 50, 0, 0, 'text', $this->config->text); ?></td>
+    <td><?php print_textarea($usehtmleditor, 10, 50, 0, 0, 'text', isset($this->config->text)?$this->config->text:'') ?></td>
 </tr>
 <tr>
     <td colspan="3" align="center">
     <input type="submit" value="<?php print_string('savechanges') ?>" /></td>
 </tr>
 </table>
-<?php use_html_editor(); ?>
+<?php if ($usehtmleditor) {
+          use_html_editor(); 
+      }
+?>