From d7f07893d08d9c29f46e50c4f779b0e701f411e4 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Wed, 15 May 2019 16:03:29 +0100
Subject: Return an error if page average calculation cant be done with hocr

---
 lib/hocr/hocr.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/hocr/hocr.go b/lib/hocr/hocr.go
index bfc6a98..dcd0494 100644
--- a/lib/hocr/hocr.go
+++ b/lib/hocr/hocr.go
@@ -2,6 +2,7 @@ package hocr
 
 import (
 	"encoding/xml"
+	"errors"
 	"io/ioutil"
 	"regexp"
 	"strconv"
@@ -121,5 +122,8 @@ func GetAvgConf(hocrfn string) (float64, error) {
 			num++
 		}
 	}
+	if num == 0 {
+		return 0, errors.New("No words found")
+	}
 	return total / num, nil
 }
-- 
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