File 0001-Fix-build-with-Octave-5.1.patch of Package octave-forge-quaternion

--- ./quaternion/DESCRIPTION
+++ ./quaternion/DESCRIPTION
@@ -5,7 +5,7 @@ Author: Lukas Reichlin <lukas.reichlin@gmail.com>
 Maintainer: Lukas Reichlin <lukas.reichlin@gmail.com>
 Title: Quaternion
 Description: Quaternion package for GNU Octave, includes a quaternion class with overloaded operators
-Depends: octave (>= 3.8.0)
+Depends: octave (>= 4.4.0)
 Autoload: no
 License: GPLv3+
 Url: http://octave.sf.net
--- ./quaternion/src/is_real_array.cc
+++ ./quaternion/src/is_real_array.cc
@@ -1,6 +1,6 @@
 /*
 
-Copyright (C) 2010-2015   Lukas F. Reichlin
+Copyright (C) 2010-2016   Lukas F. Reichlin
 
 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
@@ -46,8 +46,8 @@ Avoid nasty stuff like @code{true = isreal (\"a\")}.\n\
         {
             // args(i).ndims () should be always >= 2
             if (args(i).ndims () < 2
-                || ! ((args(i).is_numeric_type () && args(i).is_real_type ())
-                      || args(i).is_bool_type ()))
+                || ! ((args(i).isnumeric () && args(i).isreal ())
+                      || args(i).islogical ()))
             {
                 retval = false;
                 break;
--