Let elna_tac_make_variable accept an ElnaTacOperand type

Rakefile

@@ -47,12 +47,14 @@ task :convert do
 
           proc f();
           var
+          	x: ^ElnaLocation;
           	y: ElnaLocation;
           begin
+          	x := malloc(#size(ElnaLocation));
           	y.line := 1;
           	y.column := 3;
-          	x := y;
-          	printf("# %i %i %i %i\\n\\0", x.line, x.column, y.line, y.column)
+          	x^ := y;
+          	printf("# %i %i %i %i\\n\\0", x^.line, x^.column, y.line, y.column)
           end;
 
           begin
@@ -61,7 +63,6 @@ task :convert do
       elsif line.start_with?('var') && !seen_global_var
         current_stage << <<~FUN
           var
-          	x: ElnaLocation;
         FUN
       else
         current_stage << line