qga: Make errp the last parameter of qga_vss_fsfreeze

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170421122710.15373-14-famz@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index 19d72b2..04026ee 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -768,7 +768,7 @@
     /* cannot risk guest agent blocking itself on a write in this state */
     ga_set_frozen(ga_state);
 
-    qga_vss_fsfreeze(&i, &local_err, true);
+    qga_vss_fsfreeze(&i, true, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         goto error;
@@ -807,7 +807,7 @@
         return 0;
     }
 
-    qga_vss_fsfreeze(&i, errp, false);
+    qga_vss_fsfreeze(&i, false, errp);
 
     ga_unset_frozen(ga_state);
     return i;