secur32: fix crash under win98

[Alistair Leslie-Hughes]

Hi,
	Only free the handle if its valid.

Changelog:
	secur32: fix crash under win98

Best Regards
  Alistair Leslie-Hughes

-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0004-fix-crash-under-win98.patch
Type: text/x-patch
Size: 0 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20080618/8e64aecb/attachment.bin