meta: Don't forget to flag state when restoring texobjects.

It's unlikely that we changed the object but no other texture
parameter, but be correct anyway.  Noticed by inspection.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/mesa/drivers/common/meta.c

@@ -879,8 +879,11 @@ _mesa_meta_end(struct gl_context *ctx)
 
       /* restore texture objects for unit[0] only */
       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
-         _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
-                                save->CurrentTexture[tgt]);
+	 if (ctx->Texture.Unit[0].CurrentTex[tgt] != save->CurrentTexture[tgt]) {
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt],
+				   save->CurrentTexture[tgt]);
+	 }
          _mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
       }