virsh: Fix error resetting on fallback paths

On some fallback paths in virsh, error reported by the previously failed
API is cleared by virResetLastError() that doesn't free error stored by
virsh. This patch changes this to clear it using vshResetLibvirtError().

tools/virsh-domain-monitor.c

@@ -66,7 +66,7 @@ vshGetDomainDescription(vshControl *ctl, virDomainPtr dom, bool title,
 
         if (err && err->code == VIR_ERR_NO_DOMAIN_METADATA) {
             desc = vshStrdup(ctl, "");
-            virResetLastError();
+            vshResetLibvirtError();
             return desc;
         }
 
@@ -1362,7 +1362,7 @@ vshDomainListCollect(vshControl *ctl, unsigned int flags)
 
 fallback:
     /* fall back to old method (0.9.12 and older) */
-    virResetLastError();
+    vshResetLibvirtError();
 
     /* list active domains, if necessary */
     if (!MATCH(VIR_CONNECT_LIST_FILTERS_ACTIVE) ||

tools/virsh-snapshot.c

@@ -704,7 +704,7 @@ cmdSnapshotInfo(vshControl *ctl, const vshCmd *cmd)
     if (current < 0) {
         virDomainSnapshotPtr other = virDomainSnapshotCurrent(dom, 0);
 
-        virResetLastError();
+        vshResetLibvirtError();
         current = 0;
         if (other) {
             if (STREQ(name, virDomainSnapshotGetName(other)))
@@ -759,7 +759,7 @@ cmdSnapshotInfo(vshControl *ctl, const vshCmd *cmd)
     if (metadata < 0) {
         metadata = virDomainSnapshotNum(dom,
                                         VIR_DOMAIN_SNAPSHOT_LIST_METADATA);
-        virResetLastError();
+        vshResetLibvirtError();
     }
     if (metadata >= 0)
         vshPrint(ctl, "%-15s %s\n", _("Metadata:"),