From: Michael Gernoth <michael@gernoth.net>
Date: Sun, 6 Jun 2010 19:00:27 +0000 (+0200)
Subject: don't try to build an image with broken data
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/rigol/commitdiff_plain/20074af7567bf89b5cbc059340d97fba754e1747?hp=713be7a43ed11947c358fc67c11b9df7b0be204c

don't try to build an image with broken data
---

diff --git a/commands.c b/commands.c
index cb8dd6d..1b243a2 100644
--- a/commands.c
+++ b/commands.c
@@ -123,6 +123,7 @@ unsigned char* get_lcd(struct scope *sc, int *imglen, int keylock)
 
 	if (l != sizeof(screen)) {
 		printf ("hmm. didnt' get %d bytes, but %d\n\n", (int)sizeof(screen), l); 
+		return NULL;
 	}
 
 	png = lcd2png(screen, imglen);