From ca90cc78e1a85ae902e2bc8cc2c6f8b4f7dd7b96 Mon Sep 17 00:00:00 2001
From: Roland Lutz <rlutz@hedmen.org>
Date: Mon, 14 Aug 2017 13:10:57 +0200
Subject: icemulti: Refuse to pack empty image

---
 icemulti/icemulti.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/icemulti/icemulti.cc b/icemulti/icemulti.cc
index 42b4dcb..5c5f24c 100644
--- a/icemulti/icemulti.cc
+++ b/icemulti/icemulti.cc
@@ -109,6 +109,9 @@ size_t Image::size()
     ifs.seekg (0, ifs.beg);
     if (ifs.fail())
         error("can't seek on input image `%s': %s\n", filename, strerror(errno));
+
+    if (length == 0)
+        error("input image `%s' doesn't contain any data\n", filename);
     return length;
 }
 
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