From 6315bebc61ce167be79bd737df838353aef2648c Mon Sep 17 00:00:00 2001
From: Salvo 'LtWorf' Tomaselli <tiposchi@tiscali.it>
Date: Sat, 2 Jan 2016 15:59:02 +0100
Subject: [PATCH] Fix crash in case of empty history

Without that check, an empty history causes a crash
---
 relational_gui/guihandler.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/relational_gui/guihandler.py b/relational_gui/guihandler.py
index 2c4a252..79c0b95 100644
--- a/relational_gui/guihandler.py
+++ b/relational_gui/guihandler.py
@@ -88,6 +88,8 @@ class relForm(QtWidgets.QMainWindow):
         if self.history_current_line is None:
             self.history_current_line = self.ui.txtQuery.text()
 
+            if self.ui.lstHistory.currentItem() is None:
+                return
             if not self.ui.lstHistory.currentItem().text() != self.ui.txtQuery.text():
                 self.ui.lstHistory.setCurrentRow(self.ui.lstHistory.currentRow()-1)
         elif self.ui.lstHistory.currentRow() > 0: