From 38248a9e40829ac0ac0d3b574c06aad5216ff087 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 17 Jun 2012 09:28:23 +0530
Subject: [PATCH] Fix #1014103 (Error when converting any format to LRF)

---
 src/calibre/ebooks/conversion/plugins/lrf_output.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/calibre/ebooks/conversion/plugins/lrf_output.py b/src/calibre/ebooks/conversion/plugins/lrf_output.py
index c6cce8c175..c6e7d19714 100644
--- a/src/calibre/ebooks/conversion/plugins/lrf_output.py
+++ b/src/calibre/ebooks/conversion/plugins/lrf_output.py
@@ -20,6 +20,11 @@ class LRFOptions(object):
             except:
                 return ''
         m = oeb.metadata
+        for x in ('left', 'top', 'right', 'bottom'):
+            attr = 'margin_'+x
+            val = getattr(opts, attr)
+            if val < 0:
+                setattr(opts, attr, 0)
         self.title = None
         self.author = self.publisher = _('Unknown')
         self.title_sort = self.author_sort = ''