Fix #76886: Can't build xmlrpc with expat

We fix it by including "php.h" in the HAVE_LIBEXPAT case.

Author: tpetazzoni

NEWS

@@ -25,6 +25,9 @@ PHP                                                                        NEWS
   . Fixed bug #74764 (Bindto IPv6 works with file_get_contents but fails with 
     stream_socket_client). (Ville Hukkamäki)
 
+- XMLRPC:
+  . Fixed bug #76886 (Can't build xmlrpc with expat). (Thomas Petazzoni, cmb)
+
 - Zlib:
   . Fixed bug #75273 (php_zlib_inflate_filter() may not update bytes_consumed).
     (Martin Burke, cmb)

ext/xml/expat_compat.h

@@ -154,6 +154,7 @@ PHP_XML_API const XML_Char *XML_ExpatVersion(void);
 PHP_XML_API void XML_ParserFree(XML_Parser);
 
 #elif defined(HAVE_LIBEXPAT)
+#include "php.h"
 #include <expat.h>
 #endif /* HAVE_LIBEXPAT */