patch 7.4.2316

Problem:    Channel sort test is flaky.
Solution:   Add a check the output has been read.

Author: brammool

src/testdir/test_channel.vim

@@ -831,6 +831,7 @@ func Run_pipe_through_sort(all, use_buffer)
   call assert_equal("dead", job_status(g:job))
 
   sp sortout
+  call WaitFor('line("$") > 3')
   call assert_equal('Reading from channel output...', getline(1))
   if a:all
     call assert_equal(['aaa', 'bbb', 'ccc', 'ddd', 'eee'], getline(2, 6))

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2316,
 /**/
     2315,
 /**/