- Fix fatal error from last commit (#1487884), rename rcube_gc() to gc()

program/include/rcube_session.php

@@ -166,7 +166,7 @@ class rcube_session
     if ($key == $this->key && $ts - $this->start < 0.5) {
       $oldvars = $this->vars;
     } else { // else read data again from DB
-      $oldvars = $this->read($key);
+      $oldvars = $this->db_read($key);
     }
 
     if ($oldvars !== false) {
@@ -246,7 +246,7 @@ class rcube_session
       sprintf("DELETE FROM %s WHERE changed < %s",
         get_table_name('session'), $this->db->fromunixtime(time() - $maxlifetime)));
 
-    $this->rcube_gc();
+    $this->gc();
 
     return true;
   }
@@ -315,7 +315,7 @@ class rcube_session
   /**
    * Execute registered garbage collector routines
    */
-  public function rcube_gc()
+  public function gc()
   {
     foreach ($this->gc_handlers as $fct)
       $fct();