Bug [#14076]:
node sum(x:int) returns (y:int) let y = x + (0 fby y); tel
node main(x : int) returns (y : int)
let
y = 0 -> sum(pre x);
tel
is accepted whereas the node "sum" will memorize an absent value (pre x)
and use it at next instant.
Removed auto2.ept (duplicate of auto.ept)
