Fix includes for separate builds for ext/dom (#14752)

* Update include declaration in Dom css selectors

May fix 88da914#r143708340

* Remove pointless guards

* Fix Windows build

* Use relative path

Author: nielsdos

ext/dom/lexbor/lexbor/selectors-adapted/selectors.c

@@ -14,9 +14,9 @@
 #include <php.h>
 
 #include "lexbor/selectors-adapted/selectors.h"
-#include "ext/dom/namespace_compat.h"
-#include "ext/dom/domexception.h"
-#include "ext/dom/php_dom.h"
+#include "../../../namespace_compat.h"
+#include "../../../domexception.h"
+#include "../../../php_dom.h"
 
 #include <math.h>
 

ext/dom/xpath_callbacks.h

@@ -17,8 +17,6 @@
 #ifndef PHP_DOM_XPATH_CALLBACKS_H
 #define PHP_DOM_XPATH_CALLBACKS_H
 
-#if defined(HAVE_LIBXML) && defined(HAVE_DOM)
-
 #include <libxml/xpathInternals.h>
 #include "xml_common.h"
 
@@ -65,4 +63,3 @@ PHP_DOM_EXPORT zend_result php_dom_xpath_callbacks_call_php_ns(php_dom_xpath_cal
 PHP_DOM_EXPORT zend_result php_dom_xpath_callbacks_call_custom_ns(php_dom_xpath_callbacks *xpath_callbacks, xmlXPathParserContextPtr ctxt, int num_args, php_dom_xpath_nodeset_evaluation_mode evaluation_mode, dom_object *intern, php_dom_xpath_callbacks_proxy_factory proxy_factory);
 
 #endif
-#endif