Fix bug (insertion of empty objects in cell arrays).

Closes #53.

src/utilities/insert/insert_object_in_a_one_dimensional_cell_array.m

@@ -49,11 +49,31 @@ one_dimensional_cell_array = one_dimensional_cell_array(:);
 
 switch i
   case n+1
-    one_dimensional_cell_array = [one_dimensional_cell_array; object];
+    if isempty(object)
+        tmp = one_dimensional_cell_array;
+        one_dimensional_cell_array = cell(length(one_dimensional_cell_array)+1,1);
+        one_dimensional_cell_array(1:length(one_dimensional_cell_array)) = tmp;
+    else
+        one_dimensional_cell_array = [one_dimensional_cell_array; object];
+    end
   case 1
-    one_dimensional_cell_array = [object; one_dimensional_cell_array];
+    if isempty(object)
+        tmp = one_dimensional_cell_array;
+        one_dimensional_cell_array = cell(length(one_dimensional_cell_array)+1,1);
+        one_dimensional_cell_array(2:end) = tmp;
+    else
+        one_dimensional_cell_array = [object; one_dimensional_cell_array];
+    end
   otherwise
-    one_dimensional_cell_array = [one_dimensional_cell_array(1:i-1); object; one_dimensional_cell_array(i:n)];
+    if isempty(object)
+        tmp1 = one_dimensional_cell_array(1:i-1);
+        tmp2 = one_dimensional_cell_array(i:n);
+        one_dimensional_cell_array = cell(length(one_dimensional_cell_array)+1,1);
+        one_dimensional_cell_array(1:length(tmp1)) = tmp1;
+        one_dimensional_cell_array(length(tmp1)+2:end) = tmp2;
+    else
+        one_dimensional_cell_array = [one_dimensional_cell_array(1:i-1); object; one_dimensional_cell_array(i:n)];
+    end
 end
 
 if nc>nr