From 87cbb564a3ac59f5e9e94d0c59481ed70628c8e7 Mon Sep 17 00:00:00 2001
From: Thilo Graf <dbt@novatux.de>
Date: Mon, 13 Apr 2015 10:37:45 +0200
Subject: [PATCH] CTextBox: ensure save screen only if dimensions are valid

0 values are critical
---
 src/gui/widget/textbox.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/gui/widget/textbox.cpp b/src/gui/widget/textbox.cpp
index bbe28d4a3..315f94482 100644
--- a/src/gui/widget/textbox.cpp
+++ b/src/gui/widget/textbox.cpp
@@ -579,8 +579,10 @@ void CTextBox::refreshText(void)
 	if (!m_nPaintBackground && m_SaveScreen) {
 		if (m_bgpixbuf == NULL){
 			//TRACE("[CTextBox] %s save bg %d\r\n", __FUNCTION__, __LINE__);
-			m_bgpixbuf= new fb_pixel_t[dx * dy];
-			frameBuffer->SaveScreen(ax, ay, dx, dy, m_bgpixbuf);
+			if ((dx * dy) >0){
+				m_bgpixbuf= new fb_pixel_t[dx * dy];
+				frameBuffer->SaveScreen(ax, ay, dx, dy, m_bgpixbuf);
+			}
 		}
 	}