The method currently uses a local "bval" variable as argument when calling HID().SendReport(...). This is problematic, since the SendReport method doesn't use "bval" immediately. It instead captures a pointer to "bval" which is accessed when the report is sent at a later point. This leads to a use-after-free situation when the pointer captured by SendReport may no longer point to "bval".

Propose to fix the issue by introducing a new "iManufacturerDate" member in the HIDPowerDevice class to act as persistent storage for the date value.

… instead of a INPUT report, so that it matches the ManufacturerDate parameter in the HID descriptor. This is also required in order for the date to be picked up on Windows.

…have been fixed.

…nt8_t month, uint8_t day)" since it's anyhow tied to the ManufacturerDate parameter.