#471 FreeRTOS task-aware debugging with configUSE_MINI_LIST_ITEM = 0 isn't supported

[Arun Balamurali]

Due to this FreeRTOS bug, some users will set configUSE_MINI_LIST_ITEM = 0.

With this option, task-aware debugging is unable to read the pxReadyTaskLists data structure correctly because it expects the freertos_params.list_width to be 20 bytes, rather than the 28 bytes that the list becomes with configUSE_MINI_LIST_ITEM = 0. I can confirm that changing the parameter to 28 works correctly.