Add a test case for iterator and empty & var_dump interactions

ext/simplexml/tests/iterator_interaction_empty_and_var_dump.phpt

@@ -0,0 +1,48 @@
+--TEST--
+Test iterator interaction with empty and var_dump
+--EXTENSIONS--
+simplexml
+--FILE--
+<?php
+
+$xml = <<<XML
+<container>
+    <first><foo/></first>
+</container>
+XML;
+
+$sxe = simplexml_load_string($xml);
+
+echo "--- var_dump ---\n";
+
+$first = $sxe->first;
+$first->rewind();
+var_dump($first->current()->getName());
+var_dump($first);
+var_dump($first->current()->getName());
+
+echo "--- empty ---\n";
+
+$first = $sxe->first;
+$first->rewind();
+var_dump($first->current()->getName());
+var_dump(empty($first));
+var_dump($first->current()->getName());
+
+?>
+--EXPECT--
+--- var_dump ---
+string(5) "first"
+object(SimpleXMLElement)#2 (1) {
+  [0]=>
+  object(SimpleXMLElement)#4 (1) {
+    ["foo"]=>
+    object(SimpleXMLElement)#5 (0) {
+    }
+  }
+}
+string(5) "first"
+--- empty ---
+string(5) "first"
+bool(false)
+string(5) "first"