Fix epg import bug (issue #1371)

Fix_epg_import_bug_(issue_#1371).patch

Index: server/lib/mysql.class.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- server/lib/mysql.class.php	(revision 3355)
+++ server/lib/mysql.class.php	(revision )
@@ -240,6 +240,10 @@
         return $this;
     }
 
+    public function not_in($field, $values){
+        return $this->in($field, $values, true);
+    }
+
     public function group_in($fields, $type){
 
         $where = array();
\ No newline at end of file
Index: server/lib/epg.class.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- server/lib/epg.class.php	(revision 3367)
+++ server/lib/epg.class.php	(revision )
@@ -169,12 +169,18 @@
 
         $xml = null;
 
+        $total_need_to_delete = array_diff($total_need_to_delete, Mysql::getInstance()->from('epg')->not_in('real_id', $this->real_ids)->get()->all('id'));
+
         if (!empty($total_need_to_delete)){
             Mysql::getInstance()->query('delete from epg where id in ('.implode(', ', $total_need_to_delete).')');
             Mysql::getInstance()->query('OPTIMIZE TABLE epg');
         }
 
+        if (!empty($data_arr)){
-        $result = $this->db->insert('epg', $data_arr);
+            $result = $this->db->insert('epg', $data_arr);
+        }else{
+            $result = true;
+        }
 
         $setting['etag'] = $etag;
         $this->setSettings($setting);
@@ -184,9 +190,12 @@
         if (!$result){
             $str .= "<b>"._("Errors").": </b> 1\n";
         }
-        $str .= "<b>"._("Successful").": </b>".count($this->channels_updated)."\n";
+        $str .= "<b>".sprintf(_("Successful: %s channels"), count($this->channels_updated))."</b>\n";
+        $str .= "<b>".sprintf(_("Deleted: %s records"), count($total_need_to_delete))."</b>\n";
         $str .= "<b>"._("Queries").": </b>".Mysql::get_num_queries()."\n";
         $str .= "<b>"._("Exec time").": </b>".round(microtime(1) - $start_time, 2).'s';
+
+        $this->channels_updated = array();
 
         return $str;
     }
\ No newline at end of file