Bug-fix in receive_thread(): don't set inprogress flag to false until the

thread is done using the pointers to variable in the ctrl_thread (e.g. user).
This should fix the exception on line 1790.

src/sbbs3/ftpsrvr.c

@@ -1707,8 +1707,6 @@ static void receive_thread(void* arg)
 		YIELD();
 	}
 
-	if(server_socket!=INVALID_SOCKET && !terminate_server)
-		*xfer.inprogress=FALSE;
 	fclose(fp);
 
 	ftp_close_socket(xfer.data_sock,__LINE__);
@@ -1823,6 +1821,9 @@ static void receive_thread(void* arg)
 		sockprintf(xfer.ctrl_sock,"226 Upload complete (%lu cps).",cps);
 	}
 
+	if(server_socket!=INVALID_SOCKET && !terminate_server)
+		*xfer.inprogress=FALSE;
+
 	thread_down();
 }