gbrbofors_stationary LUA error on game start

[ 0] gbrbofors_stationary [ 0] LuaRules::RunCallIn: error = 2, UnitFinished, [string "LuaRules/Gadgets/game_basespawn.lua"]:67: CreateUnit(): bad unitDef name: gbrbofors_stationary stack traceback: [C]: in function 'CreateUnit' [string "LuaRules/Gadgets/game_basespawn.lua"]:67: in function 'UnitFinished' [string "LuaRules/gadgets.lua"]:1209: in function <[string "LuaRules/gadgets.lua"]:1207> (tail call): ?

Noticed this while testing AI against SVN r1002.

Fixed rev 1004