msi: Fix handling of the no-op identifier in the Directory table

[James Hawkins]

Hi,

According to [1] and [2] the period in the SourceDirectory column of
the Directory table represents a 'no-op' in that it doesn't represent
a subdirectory of its parent directory.  Any files written to this
'directory' are written to the parent directory.  This fixes bug 4251.

[1] http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/directory_table.asp
[2] http://blogs.msdn.com/robmen/archive/2005/11/04/489346.aspx

Changelog:
* Fix handling of the no-op identifier in the Directory table.

 dlls/msi/action.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

--
James Hawkins
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