[PATCH 2/2] widl: Add new type_get_type and type_get_real_type_type functions.

[Rob Shearman]

Use these to implement a few helper functions. Change the type
verification in type accessor functions to use these new functions.
---
 tools/widl/header.c    |    3 +-
 tools/widl/typelib.c   |   20 +--------
 tools/widl/typetree.h  |  115 +++++++++++++++++++++++++++++++++--------------
 tools/widl/widltypes.h |   83 ++++++++++++++++++++++++++++++++++-
 4 files changed, 166 insertions(+), 55 deletions(-)
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