Submitted by Vladimir B. Grebenschikov this patch recognizes Samsung's
images as JPEGs.

--- utils.c	2012-01-04 14:16:46.000000000 +0000
+++ utils.c	2012-01-09 00:29:31.000000000 +0000
@@ -261,7 +261,8 @@
 int
 is_image(const char * file)
 {
-	return (ends_with(file, ".jpg") || ends_with(file, ".jpeg"));
+	return (ends_with(file, ".jpg") || ends_with(file, ".jpeg") || 
+	        ends_with(file, ".mpo"));
 }
 
 int