Fix previous version check - whoops.

locallib.php

@@ -1388,7 +1388,7 @@ function att_log_convert_url(moodle_url $fullurl) {
 function attforblock_upgrade() {
     global $DB, $CFG;
     $module = $DB->get_record('modules', array('name' => 'attforblock'));
-    if ($module->version > '2011061800') {
+    if ($module->version <= '2011061800') {
         print_error("noupgradefromthisversion", 'attendance');
     }
     if (file_exists($CFG->dirroot.'/mod/attforblock')) {

version.php

@@ -22,7 +22,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-$module->version  = 2013070401;
+$module->version  = 2013070402;
 $module->requires = 2012120300;
 $module->release = '2.4.1';
 $module->maturity  = MATURITY_ALPHA;