qemu: snapshot: Detect internal snapshots also for sheepdog and RBD

When doing an internal snapshot on a VM with sheepdog or RBD disks we
would not set a flag to mark the domain is using internal snapshots and
might end up creating a mixed snapshot. Move the setting of the variable
to avoid this problem.

src/qemu/qemu_driver.c

@@ -11766,6 +11766,8 @@ qemuDomainSnapshotPrepare(virDomainObjPtr vm, virDomainSnapshotDefPtr def,
 
         switch (disk->snapshot) {
         case VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL:
+            found_internal = true;
+
             if (def->state != VIR_DOMAIN_DISK_SNAPSHOT &&
                 dom_disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK &&
                 (dom_disk->protocol == VIR_DOMAIN_DISK_PROTOCOL_SHEEPDOG ||
@@ -11789,7 +11791,6 @@ qemuDomainSnapshotPrepare(virDomainObjPtr vm, virDomainSnapshotDefPtr def,
                                disk->name);
                 goto cleanup;
             }
-            found_internal = true;
             break;
 
         case VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL: