tests: Fix PUGIXML_NO_XPATH build

tests/test_deprecated.cpp

@@ -11,6 +11,7 @@ TEST(document_deprecated_load)
 	CHECK_NODE(doc, STR("<node/>"));
 }
 
+#ifndef PUGIXML_NO_XPATH
 TEST_XML(xpath_api_deprecated_select_single_node, "<node><head/><foo id='1'/><foo/><tail/></node>")
 {
 	xpath_node n1 = doc.select_single_node(STR("node/foo"));
@@ -21,3 +22,4 @@ TEST_XML(xpath_api_deprecated_select_single_node, "<node><head/><foo id='1'/><fo
 	CHECK(n1.node().attribute(STR("id")).as_int() == 1);
 	CHECK(n2.node().attribute(STR("id")).as_int() == 1);
 }
+#endif