[PATCH] io: error_prepend() in qio_channel_readv_full_all() causes segfault

[Jagannathan Raman <jag.raman@oracle.com>]

Using error_prepend() in qio_channel_readv_full_all() causes a segfault
as errp is not set when ret is 0. This results in the failure of iotest
83. Replacing with error_setg() fixes the problem.

Additionally, removes a full stop at the end of error message

Reported-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
---
 io/channel.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/io/channel.c b/io/channel.c
index 4555021..e8b019d 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -202,8 +202,7 @@ int qio_channel_readv_full_all(QIOChannel *ioc,
     int ret = qio_channel_readv_full_all_eof(ioc, iov, niov, fds, nfds, errp);
 
     if (ret == 0) {
-        error_prepend(errp,
-                      "Unexpected end-of-file before all data were read.");
+        error_setg(errp, "Unexpected end-of-file before all data were read");
         return -1;
     }
     if (ret == 1) {
-- 
1.8.3.1