From daa31c1a9a025eccb20d0de2c419adc198df15f4 Mon Sep 17 00:00:00 2001
From: Don HO <don.h@free.fr>
Date: Sat, 14 Nov 2020 11:34:19 +0100
Subject: [PATCH] Fix "Go to..." dialog wrong Offset value in empty files

Fix #9145
---
 PowerEditor/src/ScitillaComponent/GoToLineDlg.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/PowerEditor/src/ScitillaComponent/GoToLineDlg.cpp b/PowerEditor/src/ScitillaComponent/GoToLineDlg.cpp
index ec0735cb..e889115d 100644
--- a/PowerEditor/src/ScitillaComponent/GoToLineDlg.cpp
+++ b/PowerEditor/src/ScitillaComponent/GoToLineDlg.cpp
@@ -108,6 +108,7 @@ INT_PTR CALLBACK GoToLineDlg::run_dlgProc(UINT message, WPARAM wParam, LPARAM)
 					updateLinesNumbers();
 					return TRUE;
 				}
+
 				default :
 				{
 					switch (HIWORD(wParam))
@@ -142,7 +143,8 @@ void GoToLineDlg::updateLinesNumbers() const
 	else
 	{
 		current = static_cast<unsigned int>((*_ppEditView)->execute(SCI_GETCURRENTPOS));
-		limit = static_cast<unsigned int>((*_ppEditView)->getCurrentDocLen() - 1);
+		int currentDocLength = (*_ppEditView)->getCurrentDocLen();
+		limit = static_cast<unsigned int>(currentDocLength > 0 ? currentDocLength - 1 : 0);
 	}
     ::SetDlgItemInt(_hSelf, ID_CURRLINE, current, FALSE);
     ::SetDlgItemInt(_hSelf, ID_LASTLINE, limit, FALSE);