Fix minor Octave/INTLAB issues

Author: siko1056

install_vsdp.m

@@ -15,6 +15,7 @@ function install_vsdp (settings_file)
 addpath (vsdp_path);
 addpath (fullfile (vsdp_path, 'test'));
 if (exist ('OCTAVE_VERSION', 'builtin'))
+  warning ('off', 'octave:get_input:invalid_utf8');  % INTLAB has old encoding
   warning ('off', 'Octave:shadowed-function', 'local');
   addpath (fullfile (vsdp_path, 'octave'));
 end

octave/verifyEqual.m

@@ -12,6 +12,14 @@ function verifyEqual (~, a, b, varargin)
 
 % Copyright 2016-2020 Kai T. Ohlhus (kai.ohlhus@tuhh.de)
 
+% Octave's assert has problems with "intval" class.
+if (isa (a, "intval") || isa (b, "intval"))
+  if (~ isequal (a, b))
+    error ("verifyEqual: intval test for a == b failed.");
+  endif
+  return;
+endif
+
 if (nargin == 3)
   assert(a, b);
 else