[4/8] widl: add helper function get_deref_type

[Rob Shearman]

2009/1/10 Michael Karcher <wine at mkarcher.dialup.fu-berlin.de>:
> get_deref_type yields the type of array elements for arrays or the
> pointed-to type of pointers. Most important, it works on anything
> is_declptr returns true for.

I don't believe that this type of helper function improves the
readability of the code, given that it only replaces two or three
lines of code and is only used in three places.

-- 
Rob Shearman