Use error_is_set() only when necessary

error_is_set(&var) is the same as var != NULL, but it takes
whole-program analysis to figure that out.  Unnecessarily hard for
optimizers, static checkers, and human readers.  Dumb it down to
obvious.

Gets rid of several dozen Coverity false positives.

Note that the obvious form is already used in many places.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/savevm.c b/savevm.c
index a7dbe18..7329fc5 100644
--- a/savevm.c
+++ b/savevm.c
@@ -880,7 +880,7 @@ static int del_existing_snapshots(Monitor *mon, const char *name)
         if (bdrv_can_snapshot(bs) &&
             bdrv_snapshot_find(bs, snapshot, name) >= 0) {
             bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
-            if (error_is_set(&err)) {
+            if (err) {
                 monitor_printf(mon,
                                "Error while deleting snapshot on device '%s':"
                                " %s\n",
@@ -1115,7 +1115,7 @@ void do_delvm(Monitor *mon, const QDict *qdict)
     while ((bs1 = bdrv_next(bs1))) {
         if (bdrv_can_snapshot(bs1)) {
             bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
-            if (error_is_set(&err)) {
+            if (err) {
                 monitor_printf(mon,
                                "Error while deleting snapshot on device '%s':"
                                " %s\n",