From 043a01e6bda4758ca066ee18adca0e81f3bd1c89 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Fri, 1 Sep 2006 16:40:18 +0000
Subject: [PATCH] 0 is indeed considered a valid file descriptor (issue #7861
 reported by PCadach)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@41694 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 main/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main/file.c b/main/file.c
index 5bafcfe482..6cacdc807d 100644
--- a/main/file.c
+++ b/main/file.c
@@ -1002,7 +1002,7 @@ static int waitstream_core(struct ast_channel *c, const char *breakon,
 		}
 		if (ms < 0)
 			ms = 1000;
-		if (!cmdfd) {
+		if (cmdfd > -1) {
 			res = ast_waitfor(c, ms);
 			if (res < 0) {
 				ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));