uiTable (Windows) read uninitialized pointer

[raniervf]

msvc 2019 (64 bits)
windows 10 (64 bits)

uiTable crashs at Windows 10 when access a uninitialized pointer.
To reproduce:

1. populate a uiTable with more than 1000 items
2. fast scroll with (pgdn)

Event VM_NOTIFY
Stack:
libui!uiprivTableModeCellValue+060
libui!drawTextPart+0x16e
libui!uiprivTableHandle_NMCUSTOMDRAW+0x1c0
libui!onMY_NOTIFY+0xde
libui!runMY_NOTIFY+0xa1
libui!handleParentMessages+0xbb
libui!utilWindowWndProc+0x61

[szanni]

Most likely a dupe of #416 to which two proposed fixes have been posted #484 and #515