Duplicate lines in plm_buffer_has method

[yasoob]

There seem to be some duplicate lines in plm_buffer_has method:

int plm_buffer_has(plm_buffer_t *self, size_t count) {
	if (((self->length << 3) - self->bit_index) >= count) {
		return TRUE;
	}

	if (self->load_callback) {
		self->load_callback(self, self->load_callback_user_data);
	}

	if (((self->length << 3) - self->bit_index) >= count) {
		return TRUE;
	}
	
	if (self->total_size != 0 && self->length == self->total_size) {
		self->has_ended = TRUE;
	}
	return FALSE;
}

[phoboslab]

This is correct, because the load_callback() may be called in between those checks and it may or may not have loaded enough bytes, so we have to check again.

The second check could be moved into the if (self->load_callback) { ... } though.