--- gigedit/trunk/src/gigedit/global.h	2014/05/13 12:17:43	2548
+++ gigedit/trunk/src/gigedit/global.h	2016/07/18 11:22:38	2967
@@ -1,5 +1,5 @@
 /*                                                         -*- c++ -*-
- * Copyright (C) 2007-2013 Andreas Persson
+ * Copyright (C) 2007-2015 Andreas Persson
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -24,6 +24,11 @@
 # include <config.h>
 #endif
 
+#if !defined(WIN32)
+# include <unistd.h>
+# include <errno.h>
+#endif
+
 #include <sstream>
 
 //FIXME: for some reason AC GETTEXT check fails on the Mac cross compiler?
@@ -40,6 +45,9 @@
 # define VERSION VER_STRING // VER_STRING defined in libgig_private.h
 #endif // WIN32
 
+#define UNICODE_RIGHT_ARROW     Glib::ustring(1, gunichar(0x2192))
+#define UNICODE_LEFT_ARROW      Glib::ustring(1, gunichar(0x2190))
+
 template<class T> inline std::string ToString(T o) {
     std::stringstream ss;
     ss << o;
@@ -48,6 +56,7 @@
 
 /// Find the number of bits required to hold the specified amount of zones.
 inline int zoneCountToBits(int nZones) {
+    if (!nZones) return 0;
     int iFinalBits = 0;
     int zoneBits = nZones - 1;
     for (; zoneBits > 1; iFinalBits += 2, zoneBits >>= 2);