virfile: Only generate a warning if there is something to report

Only generate a warning if there is something to report.

Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>

diff --git a/src/util/virfile.c b/src/util/virfile.c
index a45279abf8dfb034bc8ecb5fe0c8ed3a260673ca..f006abfcee4191d7d3f441738716b713debc466f 100644 (file)
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -325,7 +325,7 @@ virFileWrapperFdClose(virFileWrapperFdPtr wfd)
         return 0;
 
     ret = virCommandWait(wfd->cmd, NULL);
-    if (wfd->err_msg)
+    if (wfd->err_msg && *wfd->err_msg)
         VIR_WARN("iohelper reports: %s", wfd->err_msg);
 
     return ret;