Patch for 73150

73150.diff

commit 1c0e9126fbfb7fde3173347b7464237f56c38bfa
Author: Stanislav Malyshev <stas@php.net>
Date:   Sun Sep 25 21:25:01 2016 -0700

    Fix bug #73150: missing NULL check in dom_document_save_html

diff --git a/ext/dom/document.c b/ext/dom/document.c
index d33aaf1..1970c38 100644
--- a/ext/dom/document.c
+++ b/ext/dom/document.c
@@ -1792,7 +1792,7 @@ PHP_FUNCTION(dom_document_savexml)
 		if (options & LIBXML_SAVE_NOEMPTYTAG) {
 			xmlSaveNoEmptyTags = saveempty;
 		}
-		if (!size) {
+		if (!size || !mem) {
 			RETURN_FALSE;
 		}
 		RETVAL_STRINGL(mem, size, 1);
@@ -2327,7 +2327,7 @@ PHP_FUNCTION(dom_document_save_html)
 #else
 		htmlDocDumpMemory(docp, &mem, &size);
 #endif
-		if (!size) {
+		if (!size || !mem) {
 			RETVAL_FALSE;
 		} else {
 			RETVAL_STRINGL((const char*) mem, size, 1);