windows-reconstructor: add fallback estimation for report item bit offset

HidP_SetUsageValueArray() fails with HIDP_STATUS_NOT_IMPLEMENTED when supplied with:

HID_USAGE_XXX,
HID_COLLECTION_LOGICAL(
    HID_USAGE_YYY,
    HID_REPORT_SIZE(8),
    HID_REPORT_COUNT(1),
    HID_LOGICAL_MIN_8(0),
    HID_LOGICAL_MAX_8(0xFF),
    HID_OUTPUT(Data_Var_Abs | Volatile_Flag),
    HID_USAGE_ZZZ,
    HID_REPORT_SIZE(2),
    HID_REPORT_COUNT(16),
    HID_LOGICAL_MIN_8(-1),
    HID_LOGICAL_MAX_8(1),
    HID_OUTPUT(Data_Var_Rel | NullState_Flag | Volatile_Flag),
),

particularly the second item. With this patch the report descriptor is parsed correctly though.

Signed-off-by: Benedek Kupper <kupper.benedek@gmail.com>

Author: benedekkupper

HidSharp/Platform/Windows/WinHidDevice.ReportDescriptorReconstructor.cs

@@ -168,7 +168,18 @@ the capability array contains only one capability structure that describes one b
                             }
                             else
                             {
-                                throw new NotImplementedException();
+                                // TODO need to set the usage value array here instead
+
+                                // but we only want to find the bit offset, let's just do an educated guess
+                                if (reportItemIndex == 0)
+                                {
+                                    reportItem.BitOffset = 0;
+                                }
+                                else
+                                {
+                                    var prevItem = reportItemList[reportItemIndex - 1];
+                                    reportItem.BitOffset = prevItem.BitOffset + prevItem.ReportCount * prevItem.ReportSize;
+                                }
                             }
                         }
                         else