cleanup

config.lua

@@ -83,5 +83,7 @@ cfg.enable_network = not cfg.playable_mode
 
 assert(not cfg.ars_lips or cfg.unperturbed_trial,
        "cfg.unperturbed_trial must be true to use cfg.ars_lips")
+assert(not cfg.ars_lips or cfg.negate_trials,
+       "cfg.negate_trials must be true to use cfg.ars_lips")
 
 return cfg

nn.lua

@@ -67,9 +67,8 @@ local function arange(n, out)
     return out
 end
 
-local function allocate(t, out, init)
+local function allocate(size, out, init)
     out = out or {}
-    local size = t
     if init ~= nil then
         return init(zeros(size, out))
     else