patch 8.0.0838: buffer hangs around whem terminal window is closed

Problem:    Buffer hangs around whem terminal window is closed.
Solution:   When the job has ended wipe out a terminal buffer when the window
            is closed.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    838,
 /**/
     837,
 /**/