From 7d1565ac322e613b96246e59b55a9f236ff031a9 Mon Sep 17 00:00:00 2001
From: Laszlo Kiss <lkiss@deltaprime.com>
Date: Sat, 23 Jan 2016 22:17:01 -0700
Subject: [PATCH] Prevent shadowning of keys when a nested key's value is nil.

---
 viper.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/viper.go b/viper.go
index 00049ec..0c5310c 100644
--- a/viper.go
+++ b/viper.go
@@ -757,8 +757,10 @@ func (v *Viper) find(key string) interface{} {
 		if source != nil {
 			if reflect.TypeOf(source).Kind() == reflect.Map {
 				val := v.searchMap(cast.ToStringMap(source), path[1:])
-				jww.TRACE.Println(key, "found in nested config:", val)
-				return val
+				if val != nil {
+					jww.TRACE.Println(key, "found in nested config:", val)
+					return val
+				}
 			}
 		}
 	}