Add back fall damage block for local explosion cheats

Vanilla commit:

https://github.com/DayZMod/DayZ/commit/a02294421c53d34371cb6424a9ef97f2bb51e7f4

SQF/dayz_code/compile/fn_damageHandler.sqf

@@ -45,13 +45,23 @@ _falling = (((_hit == "legs") AND {(_source==_unit)}) AND {((_ammo=="") AND {(Da
 		if (_ammo == "") exitwith { _end = true; };
 		
 		//If _source contains no object exit. But lets not exit if the unit returns player. Maybe its his own fault.
-		if (isNull _source) then { _end = true; };
+		if (isNull _source) then {
+			_end = true;
+			if !(_ammo in ["Dragged","RunOver"]) then {
+				// Explosion with no vehicle nearby. Possible cheat. Record to block any incoming fall damage.
+				dayz_lastDamageSourceNull = true;
+				diag_log "dayz_lastDamageSourceNull triggered";
+			};
+		};
+	} else {
+		if (dayz_lastDamageSourceNull) then { _end = true; }; // Block incoming fall damage. 
 	};
 
 
 	if (_end) exitwith { 0 };
 //End Simple hack for damage ***until 2.0***
 
+dayz_lastDamageSourceNull = false;
 
 if (_unit == player) then {
 //Set player in combat

SQF/dayz_code/init/variables.sqf

@@ -592,6 +592,7 @@ if (!isDedicated) then {
 	dayz_temperaturmin = 27; //TeeChange
 
 	//player special variables
+	dayz_lastDamageSourceNull = false;
 	dayz_lastDamageSource = "none";
 	dayz_lastDamageTime = 0;
 	dayz_lastMedicalSource = "none";