Give inTraderCity a default value

There is no point in setting inTraderCity = "Any"; since you can use the
isInTraderCity variable to check if a player is in any trader city. Also
"Any" will return false for isNil, so the only time "Unknown Trader
City" was being used was when the player had not entered any city yet.
If they left a known trader and went to an unknown one the RPT message
would say "bought x at Any". Now it will correctly say "Unknown Trader"
anytime a purchase is made without inTraderCity being set.

SQF/dayz_code/init/variables.sqf

@@ -517,6 +517,7 @@ if (isNil "DZE_plotOwnershipExclusions") then {
 	DZE_plotTakeOwnershipItems = DayZ_SafeObjects - (DZE_LockableStorage + ["Plastic_Pole_EP1_DZ","DZ_storage_base"]);
 };
 isInTraderCity = false;
+inTraderCity = "Unknown Trader";
 PlayerDeaths = [];
 PVDZE_obj_Trade = []; // For all traders increment qty
 PVDZE_plr_DeathB = [];