MINOR: obj_type: new object type for struct stream

This patch creates a new obj_type for the struct stream in HAProxy.
diff --git a/include/types/obj_type.h b/include/types/obj_type.h
index e141d69..9410718 100644
--- a/include/types/obj_type.h
+++ b/include/types/obj_type.h
@@ -41,6 +41,7 @@
 	OBJ_TYPE_CONN,         /* object is a struct connection */
 	OBJ_TYPE_SRVRQ,        /* object is a struct dns_srvrq */
 	OBJ_TYPE_CS,           /* object is a struct conn_stream */
+	OBJ_TYPE_STREAM,       /* object is a struct stream */
 	OBJ_TYPE_ENTRIES       /* last one : number of entries */
 } __attribute__((packed)) ;