glib_socket.h: wrap g_io_channel_*_new() calls portably

The server_socket library (used by the httpd output plugin) didn't
check for WIN32, that's fixed now.

src/glib_socket.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_GLIB_SOCKET_H
+#define MPD_GLIB_SOCKET_H
+
+#include <glib.h>
+
+/**
+ * Portable wrapper for g_io_channel_unix_new() or
+ * g_io_channel_win32_new_socket().
+ */
+G_GNUC_MALLOC
+static inline GIOChannel *
+g_io_channel_new_socket(int fd)
+{
+#ifdef G_OS_WIN32
+	return g_io_channel_win32_new_socket(fd);
+#else
+	return g_io_channel_unix_new(fd);
+#endif
+}
+
+#endif