From f7a511d1b3750bc620e03b393d92c490a9288545 Mon Sep 17 00:00:00 2001
From: Florent Rougon <f.rougon@free.fr>
Date: Tue, 14 Mar 2017 20:24:32 +0100
Subject: [PATCH] Fix includes in zlibstream.hxx

Forward declarations of std::streambuf and std::istream are not enough,
since this file declares classes derived from them.
---
 simgear/io/iostreams/zlibstream.hxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/simgear/io/iostreams/zlibstream.hxx b/simgear/io/iostreams/zlibstream.hxx
index 72881f62..bd264a1b 100644
--- a/simgear/io/iostreams/zlibstream.hxx
+++ b/simgear/io/iostreams/zlibstream.hxx
@@ -23,8 +23,9 @@
 #ifndef SG_ZLIBSTREAM_HXX
 #define SG_ZLIBSTREAM_HXX
 
-#include <iosfwd>
 #include <ios>                  // std::streamsize
+#include <istream>
+#include <streambuf>
 #include <memory>               // std::unique_ptr
 #include <zlib.h>               // struct z_stream