hid: Fill the HIDD_ATTRIBUTES Size member, and add a test for expected size.

dlls/hid/hidd.c

@@ -69,6 +69,7 @@ BOOLEAN WINAPI HidD_GetAttributes(HANDLE HidDeviceObject, PHIDD_ATTRIBUTES Attr)
 
     if (ret)
     {
+        Attr->Size = sizeof(HIDD_ATTRIBUTES);
         Attr->VendorID = info.VendorID;
         Attr->ProductID = info.ProductID;
         Attr->VersionNumber = info.VersionNumber;

dlls/hid/tests/device.c

@@ -34,6 +34,7 @@ static void test_device_info(HANDLE device)
 {
     PHIDP_PREPARSED_DATA ppd;
     HIDP_CAPS Caps;
+    HIDD_ATTRIBUTES attributes;
     NTSTATUS status;
     BOOL rc;
     WCHAR device_name[128];
@@ -47,6 +48,10 @@ static void test_device_info(HANDLE device)
     trace("Found device %s (%02x, %02x)\n", wine_dbgstr_w(device_name), Caps.UsagePage, Caps.Usage);
     rc = HidD_FreePreparsedData(ppd);
     ok(rc, "Failed to free preparsed data(0x%x)\n", GetLastError());
+    rc = HidD_GetAttributes(device, &attributes);
+    ok(rc, "Failed to get device attributes (0x%x)\n", GetLastError());
+    ok(attributes.Size == sizeof(attributes), "Unexpected HIDD_ATTRIBUTES size: %d\n", attributes.Size);
+    trace("Device attributes: vid:%04x pid:%04x ver:%04x\n", attributes.VendorID, attributes.ProductID, attributes.VersionNumber);
 }
 
 static void run_for_each_device(device_test *test)