MSACM: fix acmMetrics(ACM_METRIC_DRIVER_PRIORITY) return on error to make test pass

[Alex Villací­s Lasso]

As promised, this patch fixes the return behavior of 
ACM_METRIC_DRIVER_PRIORITY to make the failing test pass

Changelog:
* Fix ACM_METRIC_DRIVER_PRIORITY return on error

Alex Villacís Lasso

-------------- next part --------------
A non-text attachment was scrubbed...
Name: wine-msacm-00-ACM_METRIC_DRIVER_PRIORITY-errorcode.patch
Type: text/x-patch
Size: 1009 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20060116/f804eb04/wine-msacm-00-ACM_METRIC_DRIVER_PRIORITY-errorcode.patch