vmstate: constify SaveVMHandlers

Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20181114133139.27346-1-marcandre.lureau@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

include/migration/register.h

@@ -72,7 +72,7 @@ int register_savevm_live(DeviceState *dev,
                          const char *idstr,
                          int instance_id,
                          int version_id,
-                         SaveVMHandlers *ops,
+                         const SaveVMHandlers *ops,
                          void *opaque);
 
 void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque);

migration/savevm.c

@@ -303,7 +303,7 @@ typedef struct SaveStateEntry {
     int section_id;
     /* section id read from the stream */
     int load_section_id;
-    SaveVMHandlers *ops;
+    const SaveVMHandlers *ops;
     const VMStateDescription *vmsd;
     void *opaque;
     CompatEntry *compat;
@@ -614,7 +614,7 @@ int register_savevm_live(DeviceState *dev,
                          const char *idstr,
                          int instance_id,
                          int version_id,
-                         SaveVMHandlers *ops,
+                         const SaveVMHandlers *ops,
                          void *opaque)
 {
     SaveStateEntry *se;