From 1dacfc570902ccf0d1902b44a33857ecdc79eba8 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 15 Apr 2015 10:30:19 +0530
Subject: [PATCH] ...

---
 src/calibre/ebooks/docx/writer/images.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/docx/writer/images.py b/src/calibre/ebooks/docx/writer/images.py
index 4b87e0e67c..c745c86d6d 100644
--- a/src/calibre/ebooks/docx/writer/images.py
+++ b/src/calibre/ebooks/docx/writer/images.py
@@ -21,10 +21,17 @@ from calibre.utils.magick.draw import identify_data
 
 Image = namedtuple('Image', 'rid fname width height fmt item')
 
+def as_num(x):
+    try:
+        return float(x)
+    except Exception:
+        pass
+    return 0
+
 def get_image_margins(style):
     ans = {}
     for edge in 'Left Right Top Bottom'.split():
-        val = getattr(style, 'padding' + edge) + getattr(style, 'margin' + edge)
+        val = as_num(getattr(style, 'padding' + edge)) + as_num(getattr(style, 'margin' + edge))
         ans['dist' + edge[0]] = str(pt_to_emu(val))
     return ans