nouveau: Catch some more leaks.

src/gallium/state_trackers/g3dvl/vl_r16snorm_mc_buf.c

@@ -745,6 +745,7 @@ static int vlFlush
 	}
 
 	pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, &mc->buffered_surface->render_fence);
+	pipe->screen->tex_surface_release(pipe->screen, mc->render_target.cbufs[0]);
 
 	for (i = 0; i < 3; ++i)
 		mc->zero_block[i].x = -1.0f;

src/gallium/winsys/drm/nouveau/nouveau_channel.c

@@ -118,6 +118,8 @@ nouveau_channel_free(struct nouveau_channel **chan)
 	nouveau_grobj_free(&nvchan->base.gart);
 	nouveau_grobj_free(&nvchan->base.nullobj);
 
+	free(nvchan->pb.buffers);
+	free(nvchan->pb.relocs);
 	cf.channel = nvchan->drm.channel;
 	drmCommandWrite(nvdev->fd, DRM_NOUVEAU_CHANNEL_FREE, &cf, sizeof(cf));
 	free(nvchan);