Fix for bug 2705:

Decoupling from the beast that is /mod/forum/lib.php, it was a pity to
include 100+ KB of code so that we could reuse 7-8 lines.

This block also wasn't including that library itself, so after Martin
removed that dependency from courses it was broken as well.

blocks/search_forums/block_search_forums.php

@@ -3,24 +3,31 @@
 class block_search_forums extends block_base {
     function init() {
         $this->title = get_string('search', 'forum');
-        $this->version = 2004041000;
+        $this->version = 2005030900;
     }
 
     function get_content() {
+        global $CFG;
+
         if($this->content !== NULL) {
             return $this->content;
         }
 
+        $this->content = new stdClass;
+        $this->content->footer = '';
+
         if (empty($this->instance)) {
-            $this->content = '';
+            $this->content->text   = '';
             return $this->content;
         }
 
-        $course = get_record('course', 'id', $this->instance->pageid);
-
-        $this->content = new stdClass;
-        $this->content->text = forum_print_search_form($course, '', true, 'block');
-        $this->content->footer = '';
+        $this->content->text  = '<div class="searchform">';
+        $this->content->text .= '<form name="search" action="'.$CFG->wwwroot.'/mod/forum/search.php" style="display:inline">';
+        $this->content->text .= '<input name="search" type="text" size="18" value="" alt="search" /> ';
+        $this->content->text .= '<input value="'.get_string('searchforums', 'forum').'" type="submit" />';
+        $this->content->text .= helpbutton('search', get_string('search'), 'moodle', true, false, '', true);
+        $this->content->text .= '<input name="id" type="hidden" value="'.$this->instance->pageid.'" />';
+        $this->content->text .= '</form></div>';
 
         return $this->content;
     }