bug#20978: [PATCH 1/7] ; Minor cleanup of wait_reading_process_output

[Ian Kelling]

* src/process.c (wait_reading_process_output): simplify logic, fix dos
version comments

diff --git a/src/process.c b/src/process.c
index 5272792..191f617 100644
--- a/src/process.c
+++ b/src/process.c
@@ -4873,8 +4873,7 @@ wait_reading_process_output (intmax_t time_limit, int 
nsecs, int read_kbd,
          no_avail = 1;
          FD_ZERO (&Available);
        }
-
-      if (!no_avail)
+      else
        {

 #ifdef ADAPTIVE_READ_BUFFERING
@@ -6965,9 +6964,7 @@ extern int sys_select (int, fd_set *, fd_set *, fd_set *,
    DO_DISPLAY means redisplay should be done to show subprocess
    output that arrives.

-   Return positive if we received input from WAIT_PROC (or from any
-   process if WAIT_PROC is null), zero if we attempted to receive
-   input but got none, and negative if we didn't even try.  */
+   Returns -1 signifying we got no output and did not try.  */

 int
 wait_reading_process_output (intmax_t time_limit, int nsecs, int read_kbd,
--
2.4.5