test: Make implementation of loadobj function in test less restrictive.

* test/classdef-load-save/loadobj_saveobj_class.m (loadobj): Adapt to work with
struct or classdef object input argument. There is a dedicated test that checks
for the type of the input argument of the loadobj function.

Author: mmuetzel

test/classdef-load-save/loadobj_saveobj_class.m

@@ -2,13 +2,11 @@
   methods (Static)
     function obj = loadobj (s)
       obj = loadobj_saveobj_class ();
-      if (isstruct (s))
-        obj.a = s.a;
-        obj.b = s.b;
-        obj.c = s.c;
-        obj.d = s.d;
-        obj.e = s.e;
-      endif
+      obj.a = s.a;
+      obj.b = s.b;
+      obj.c = s.c;
+      obj.d = s.d;
+      obj.e = s.e;
     endfunction
   endmethods