From 467db84f828fb11783998e096ec3b9e7b8a3fb86 Mon Sep 17 00:00:00 2001
From: Andy Maloney <asmaloney@gmail.com>
Date: Mon, 10 Sep 2018 14:17:23 -0400
Subject: [PATCH] Check string length before trying to resize it

Fixes #33
---
 exif.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/exif.cpp b/exif.cpp
index 0cec9db..15a1105 100644
--- a/exif.cpp
+++ b/exif.cpp
@@ -349,7 +349,7 @@ IFEntry parseIFEntry_temp(const unsigned char *buf, const unsigned offs,
       }
       // and cut zero byte at the end, since we don't want that in the
       // std::string
-      if (result.val_string()[result.val_string().length() - 1] == '\0') {
+      if (result.length() && result.val_string()[result.val_string().length() - 1] == '\0') {
         result.val_string().resize(result.val_string().length() - 1);
       }
       break;