[PATCH]: read var leak

[Nathan Sidwell]

hi,
this patch fixes a leak of value objects.  When a value's symbol is
LOC_COMPUTED or ARG_LOC_COMPUTED, the symbol's read_variable method
allocates the value object.  The current ordering in read_var_value
has already created a value object for the value, so we end up with
an empty value object on the value chain.  This isn't fatal, but
is confusing.

built & tested on i686-pc-linux-gnu and an unreleased architecture, ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk

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