MSI: return ERROR_MORE_DATA when needed (RESEND)

[Mike McCormack]

ChangeLog:
* fix MsiSummaryInfoGetProperty to return ERROR_MORE_DATA if the buffer 
is too small (based on a patch by Aric Stewart)
* add a test case to show correct behaviour

-------------- next part --------------
A non-text attachment was scrubbed...
Name: msi-suminfo-moredata.diff
Type: text/x-patch
Size: 3299 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20050906/26290c68/msi-suminfo-moredata.diff