A_Chase doesn't accept "" for missing state

[MartinHowe]

I have a monster that has only a melee attack but want flag 16 ("stay still"). When specifying the missile state:

Using BOSS C 2 A_Chase("Melee", "" , 16) gives a "negative jump offset" error.
Using BOSS C 2 A_Chase("Melee", None, 16) gives a "string constant expected" error.
Using BOSS C 2 A_Chase("Melee", Null, 16) gives a "string constant expected" error.
Using BOSS C 2 A_Chase("Melee", "NULL", 16) works, but only because "NULL" is an undefined state label and the log file is littered with errors to that effect.
Using BOSS C 2 A_Chase("Melee", 0, 16) gives a "negative jump offset" error.

If the official way to specify "there isn't one" for one of the states is broken, please fix it
If there is no official way to specify "there isn't one" for one of the states, please add one
If there is, please tell me what it is.

[Graf Zahl]

"" is supposed work. The problem is simple: It checks for the name constant 0 - which unfortunately is not "" as one might think but "none". But please DO NOT use that! This has been annoying me for ages so I'm going to change it to "" as it should be.

[Matt]

"" is supposed work. The problem is simple: It checks for the name constant 0 - which unfortunately is not "" as one might think but "none". But please DO NOT use that! This has been annoying me for ages so I'm going to change it to "" as it should be.

Does this apply to other strings that can take null values (e.g., certain sound specifications and cancelling out inherited properties)?

[Graf Zahl]

A_Chase was a special case because it needs a (none) value. But for sounds it's essentially the same but there specifying a non-existing sound was the same as specifying nothing so it didn't matter.

[randi]

Oh? That's why you did that? In that case, sorry, but I'm reverting your change. 'None' was always meant to represent nothing in the name table, not ''.

In this case, as far as I can tell, the real bug is that SC_CheckNumber() considered "" to be the number 0, so the example usage with "" was being treated as if 0 had been used instead.

[Graf Zahl]

It didn't work anyway. I fixed it for real now by making offset 0 and the empty strings synonymous for 'no state passed'.