msi: Don't wait on closed handles in ACTION_FinishCustomActions.

[Robert Shearman]

The handle will be closed by free_custom_action_data, so duplicate the 
handle before calling it.
---
  dlls/msi/custom.c |    6 +++++-
  1 files changed, 5 insertions(+), 1 deletions(-)

This should fix a race in some installers, including Dragon Naturally 
Speaking 9.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 2814a6554b1140c6d43f1ae7cb33b55945aa7b68.diff
Type: text/x-patch
Size: 893 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20070403/a26fccd8/2814a6554b1140c6d43f1ae7cb33b55945aa7b68.bin