Fix score bonus for defending the flag carrier in CTF

Fix copy-paste error in the original Quake 3 code. The wrong values
are used for v1 and v2. v2 was previously set to distance of attacker
to flag base; which should be handled already.

The game now gives defense score bonus to player when they frag an
enemy near their team's flag carrier while the player is more than
1000 units from the flag carrier.

This may also fix not giving defense bonus when near carrier due to
checking if carrier and enemy (instead of attacker) are in PVS.

Found by @Razish.

code/game/g_team.c

@@ -462,7 +462,7 @@ void Team_FragBonuses(gentity_t *targ, gentity_t *inflictor, gentity_t *attacker
 
 	if (carrier && carrier != attacker) {
 		VectorSubtract(targ->r.currentOrigin, carrier->r.currentOrigin, v1);
-		VectorSubtract(attacker->r.currentOrigin, carrier->r.currentOrigin, v1);
+		VectorSubtract(attacker->r.currentOrigin, carrier->r.currentOrigin, v2);
 
 		if ( ( ( VectorLength(v1) < CTF_ATTACKER_PROTECT_RADIUS &&
 			trap_InPVS(carrier->r.currentOrigin, targ->r.currentOrigin ) ) ||