From 62c463823dce4962267fa8a0ea196ab9940a05a3 Mon Sep 17 00:00:00 2001
From: Shaun Dunning <shaun.dunning@uservoice.com>
Date: Thu, 8 Nov 2018 11:16:50 -0500
Subject: [PATCH] bugfix: store ptr to MatcherKeys in case user registered
 matchers are used.

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

diff --git a/match.go b/match.go
index 0368567..74e956d 100644
--- a/match.go
+++ b/match.go
@@ -12,7 +12,7 @@ import (
 var Matchers = matchers.Matchers
 
 // MatcherKeys is an alias to matchers.MatcherKeys
-var MatcherKeys = matchers.MatcherKeys
+var MatcherKeys = &matchers.MatcherKeys
 
 // NewMatcher is an alias to matchers.NewMatcher
 var NewMatcher = matchers.NewMatcher
@@ -24,7 +24,7 @@ func Match(buf []byte) (types.Type, error) {
 		return types.Unknown, ErrEmptyBuffer
 	}
 
-	for _, kind := range MatcherKeys {
+	for _, kind := range *MatcherKeys {
 		checker := Matchers[kind]
 		match := checker(buf)
 		if match != types.Unknown && match.Extension != "" {