cppcheck not recognizing that a parameter can be marked const

[Tobias Markus]

In the attached file, in line 119, the parameter c can be passed as const ref

ColorOKLCh lab_to_lch(ColorOKLab& c)
{
  return ColorOKLCh{c.L, sqrtf(c.a * c.a + c.b * c.b), atan2f(c.b, c.a)};
}

cppcheck 2.5 somehow misses that.

[Tobias Markus]

The same is true for the functions

srgb_to_linear_srgb
linear_srgb_to_srgb
linear_srgb_to_oklab