python: size is not a member of pipe_constant_buffer any more.

src/gallium/state_trackers/python/p_context.i

@@ -121,7 +121,6 @@ struct st_context {
       struct pipe_constant_buffer state;
       memset(&state, 0, sizeof(state));
       state.buffer = buffer ? buffer->buffer : NULL;
-      state.size = buffer->buffer->size;
       $self->pipe->set_constant_buffer($self->pipe, shader, index, &state);
    }