commit 12dfc9eef14fe74c46145aa9e6cba9666f1bcd40
author Bram Moolenaar <Bram@vim.org> Mon Jan 28 22:32:58 2019 +0100
committer Bram Moolenaar <Bram@vim.org> Mon Jan 28 22:32:58 2019 +0100
tree 3a3c98030644028f710d33d7c2b2558ac0f2db13
parent f58d81a18752cb9bf899b3f7328fc489cf6558e8

patch 8.1.0840: getchar(0) never returns a character in the terminal

Problem:    getchar(0) never returns a character in the terminal.
Solution:   Call wait_func() at least once.

src/gui_x11.c

diff --git a/src/gui_x11.c b/src/gui_x11.c
index c8a3b77..ad91a21 100644
--- a/src/gui_x11.c
+++ b/src/gui_x11.c
@@ -2683,9 +2683,10 @@
 
     timed_out = FALSE;
 
-    if (wtime > 0)
-	timer = XtAppAddTimeOut(app_context, (long_u)wtime, gui_x11_timer_cb,
-								  &timed_out);
+    if (wtime >= 0)
+	timer = XtAppAddTimeOut(app_context,
+				(long_u)(wtime == 0 ? 1L : wtime),
+						 gui_x11_timer_cb, &timed_out);
 #ifdef FEAT_JOB_CHANNEL
     /* If there is a channel with the keep_open flag we need to poll for input
      * on them. */