Fix handling of non-reference operands in prefix operations.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com

jerry-core/parser/js/opcodes-dumper.cpp

@@ -1225,7 +1225,7 @@ check_operand_in_prefix_operation (jsp_operand_t obj) /**< operand, which type s
   const op_meta last = last_dumped_op_meta ();
   if (last.op.op_idx != VM_OP_PROP_GETTER)
   {
-    if (obj.is_empty_operand ())
+    if (obj.is_register_operand ())
     {
       /*
        * FIXME:

tests/jerry/arithmetics-2.js

@@ -43,3 +43,11 @@ assert (++o.p === 2);
 assert (o.p === 2);
 assert (--o.p === 1);
 assert (o.p === 1);
+
+try {
+  eval ('++ ++ a');
+  assert (false);
+}
+catch (e) {
+  assert (e instanceof ReferenceError);
+}