clif_broadcast

[Foob]

Hello,

I'm trying to edit clif_broadcast function from clif.cpp to work with player who has var like example below.

void clif_broadcast(struct block_list* bl, const char* mes, int len, int type, enum send_target target)
{
	nullpo_retv(mes);
	if (len < 2)
		return;

	int lp = (type&BC_COLOR_MASK) ? 4 : 0;
	std::unique_ptr<unsigned char> buf(new unsigned char[4+lp+len]);

	WBUFW(buf.get(),0) = 0x9a;
	WBUFW(buf.get(),2) = 4 + lp + len;
	if (type&BC_BLUE)
		WBUFL(buf.get(),4) = 0x65756c62; //If there's "blue" at the beginning of the message, game client will display it in blue instead of yellow.
	else if (type&BC_WOE)
		WBUFL(buf.get(),4) = 0x73737373; //If there's "ssss", game client will recognize message as 'WoE broadcast'.
	memcpy(WBUFP(buf.get(), 4 + lp), mes, len);
	
	struct map_session_data* sd;
	nullpo_retv(sd);
	int counter = static_cast<int>(pc_readreg2( sd, MY_VAR ));
	
	if(counter < 1)
		clif_send(buf.get(), WBUFW(buf.get(),2), bl, target);
}

When I compile, there's a problem where it says: "uninitialized local variable 'sd' used"

The server will start but come broadcast it will crash and will point out to the line. What am I missing? Is this possible?