Nikon D7000 raw white level too high

[kofa73]

The following shows a small part of an overexposed Nikon D7000 raw file in darktable 3.9.0+1483~gfb7ae22e9, with -1 EV applied in the exposure module, and raw clipping indicator enabled:

As you can see, most the magenta area is not marked as overexposed.
RawTherapee's camconst.json lists the max RGB levels as
"white": [ 16300, 15700, 16300 ], // typical R 16383, G 15778, B 16383
https://github.com/Beep6581/RawTherapee/blob/dev/rtengine/camconst.json#L1680

Changing the raw white level to 15780 (close to the 'typical' G level of 15778) produces the following - the clipping indicator closely matching the clipped (magenta) areas:

[ilyapopov]

For the reference: this is where white point is specified in RawSpeed:

rawspeed/data/cameras.xml

Line 5309 in 8c9b377

<Sensor black="0" white="15892"/>