patch 7.4.1811
Problem: Netbeans channel gets garbage collected.
Solution: Set reference in nb_channel.
diff --git a/src/proto/netbeans.pro b/src/proto/netbeans.pro
index 2df71a1..869e966 100644
--- a/src/proto/netbeans.pro
+++ b/src/proto/netbeans.pro
@@ -10,6 +10,7 @@
int netbeans_active(void);
void netbeans_open(char *params, int doabort);
void netbeans_send_disconnect(void);
+int set_ref_in_nb_channel(int copyID);
void netbeans_frame_moved(int new_x, int new_y);
void netbeans_file_activated(buf_T *bufp);
void netbeans_file_opened(buf_T *bufp);