From 40d241b13821c034aae4248e343741603188e5a6 Mon Sep 17 00:00:00 2001
From: David Hull <david.hull@openx.com>
Date: Sat, 21 Nov 2015 20:30:56 +0000
Subject: [PATCH] Handle fmt_shift(0) -> 0.

tz_shift(_, "UTC") returns 0, but fmt_shift/1 previously did not handle
that.  An alternative fix would be for tz_shift(_, "UTC") to return
{'+', 0, 0}.
---
 src/localtime.erl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/localtime.erl b/src/localtime.erl
index 42781e3..c3eee0c 100644
--- a/src/localtime.erl
+++ b/src/localtime.erl
@@ -205,6 +205,8 @@ fmt_shift({'+', H, M}) ->
    H * 60 + M;
 fmt_shift({'-', H, M}) ->
    -(H * 60 + M);
+fmt_shift(0) ->
+   0;
 fmt_shift(Any) ->
    throw(Any).