From 56b5bf3f438e0b99c7a35b79ad169be36c2fa352 Mon Sep 17 00:00:00 2001
From: Scott R Charlton <charlton@usgs.gov>
Date: Tue, 6 Nov 2018 16:25:34 -0700
Subject: [PATCH] create valid ranges when sscanf doesn't return 2

---
 read.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/read.cpp b/read.cpp
index cd490169..f482ad51 100644
--- a/read.cpp
+++ b/read.cpp
@@ -3747,6 +3747,14 @@ read_number_description(char *ptr, int *n_user,
 			n = sscanf(token, "%d%d", n_user, n_user_end);
 			if (n != 2)
 			{
+				if (n == 0)
+				{
+					*n_user_end = *n_user = 1;
+				}
+				else
+				{
+					*n_user_end = *n_user;
+				}
 				if (next_keyword >= 0)
 				{
 					error_string = sformatf( "Reading number range for %s.", Keywords::Keyword_name_search(next_keyword).c_str());