[CMake] Backslashed whitespace in ADD_CUSTOM_COMMAND's ARG expansion

[Eric BOIX]

	Dear Mathieu,

Quoting Mathieu Malaterre <mathieu.malaterre at kitware.com>:
> I believe you are looking for:
>     Split space separated arguments into a semi-colon separated list.
>     SEPARATE_ARGUMENTS(VARIABLE)
> You need to call it before the ADD_CUSTOM_COMMAND.
Indeed, I does the job ! But I remain clueless about why it does the job !
I would never have guessed that one from the documentation (the semi-colons
do not appear on the command line, so some undocumented magic takes places
somewhere, no !?). Anyhow, I does work...

> Ps: By `idl' do you mean RSI scripting language ?
Never heard of that one. Anyhow, I'm perfectly happy with VTK ! ;-]
I meant the omniORB IDL compiler (see 
http://omniorb.sourceforge.net/omni40/omniidl.html). But the command itself
was meaningless for my problem. The ARG was the problem...

	Thanks a lot !
	Yours,
	Eric Boix.