patch 8.1.0735: cannot handle binary data

Problem:    Cannot handle binary data.
Solution:   Add the Blob type. (Yasuhiro Matsumoto, closes #3638)
diff --git a/src/netbeans.c b/src/netbeans.c
index c8084df..ebacf60 100644
--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -404,7 +404,7 @@
 	if (*p == NUL)
 	{
 	    own_node = TRUE;
-	    buffer = channel_get(nb_channel, PART_SOCK);
+	    buffer = channel_get(nb_channel, PART_SOCK, NULL);
 	    /* "node" is now invalid! */
 	}
 	else