Fix code via suggestion from Niels

Author: Girgias

ext/standard/basic_functions.c

@@ -421,6 +421,9 @@ PHP_RINIT_FUNCTION(basic) /* {{{ */
 	BASIC_RINIT_SUBMODULE(dir)
 	BASIC_RINIT_SUBMODULE(url_scanner_ex)
 
+	/* Initialize memory for last http headers */
+	ZVAL_UNDEF(&BG(last_http_headers));
+
 	/* Setup default context */
 	FG(default_context) = NULL;
 
@@ -485,6 +488,9 @@ PHP_RSHUTDOWN_FUNCTION(basic) /* {{{ */
 	BASIC_RSHUTDOWN_SUBMODULE(user_filters)
 	BASIC_RSHUTDOWN_SUBMODULE(browscap)
 
+	/* Free last http headers */
+	zval_ptr_dtor(&BG(last_http_headers));
+
 	BG(page_uid) = -1;
 	BG(page_gid) = -1;
 	return SUCCESS;

ext/standard/http.c

@@ -242,6 +242,6 @@ PHP_FUNCTION(http_last_response_header)
 	zend_parse_parameters_none();
 
 	if (!Z_ISUNDEF(BG(last_http_headers))) {
-		ZVAL_DUP(return_value, &BG(last_http_headers));
+		ZVAL_COPY(return_value, &BG(last_http_headers));
 	}
 }