burnable.lua has incorrect default value initialization

function Burnable:SpawnFX(immediate)

    if self.nofx then
        return
    end
    
    self:KillFX()
    
    if not self.fxdata then
        self.fxdata = { x = 0, y = 0, z = 0, level=self:GetDefaultFXLevel() }
    end
    

should be at least

    if not self.fxdata then
        self.fxdata = {{ x = 0, y = 0, z = 0, level=self:GetDefaultFXLevel() }}
    end