Fix Sarin Gas Crackdown not ending after losing all units

mods/ra/maps/sarin-gas-1-crackdown/crackdown.lua

@@ -154,6 +154,10 @@ Tick = function()
 	if ussr.HasNoRequiredUnits() and badguy.HasNoRequiredUnits() then
 		greece.MarkCompletedObjective(objKillAll)
 	end
+
+	if greece.HasNoRequiredUnits() then
+		ussr.MarkCompletedObjective(ussrObj)
+	end
 end
 
 WorldLoaded = function()