Don't close audio[0] if you're not careful

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1887 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_agi.c

@@ -168,8 +168,10 @@ static int launch_script(char *script, char *args, int *fds, int *efd, int *opid
 	close(toast[1]);
 	close(fromast[0]);
 
-	// [PHM 12/18/03]
-	close(audio[0]);
+	if (efd) {
+		// [PHM 12/18/03]
+		close(audio[0]);
+	}
 
 	*opid = pid;
 	return 0;