cov: set error_vg only when pointer is non null

diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index 4471f7c8633fc25378e0bd50b02e6430cd73e44c..002d80c010cb2dcae44afdcb2953496972d715e2 100644 (file)
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -4954,7 +4954,8 @@ struct volume_group *vg_read(struct cmd_context *cmd, const char *vg_name, const
                log_very_verbose("Reading orphan VG %s.", vg_name);
                vg = vg_read_orphans(cmd, vg_name);
                *error_flags = 0;
-               *error_vg = NULL;
+               if (error_vg)
+                       *error_vg = NULL;
                return vg;
        }