Avoid using uninitialised struct

Author: Mikhail Galanin

ext/mysqlnd/mysqlnd_result.c

@@ -172,7 +172,7 @@ mysqlnd_query_read_result_set_header(MYSQLND_CONN_DATA * conn, MYSQLND_STMT * s)
 	enum_func_status ret;
 	MYSQLND_STMT_DATA * stmt = s ? s->data : NULL;
 	MYSQLND_PACKET_RSET_HEADER rset_header;
-	MYSQLND_PACKET_EOF fields_eof;
+	MYSQLND_PACKET_EOF fields_eof = {0};
 
 	DBG_ENTER("mysqlnd_query_read_result_set_header");
 	DBG_INF_FMT("stmt=" ZEND_ULONG_FMT, stmt? stmt->stmt_id:0);

ext/mysqlnd/mysqlnd_wireprotocol.h

@@ -34,7 +34,7 @@ PHPAPI extern const char mysqlnd_read_body_name[];
 #define PACKET_FREE(packet) \
 	do { \
 		DBG_INF_FMT("PACKET_FREE(%p)", packet); \
-		if ((packet)->header.m->free_mem) { \
+		if ((packet)->header.m && (packet)->header.m->free_mem) { \
 			((packet)->header.m->free_mem((packet))); \
 		} \
 	} while (0);