Aranym screen driver does not honour offscreen bitmap handle

[mfro0]

all drivers (tested with firebee.sys and bitmap.sys) appear to support offscreen bitmaps opened with v_opnbm() just fine.
GDP output is redirected to that bitmap and can be copied from there to the screen.

While the aranym.sys driver also opens a bitmap using v_opnbm() without error, it does not draw to the bitmap representing the passed bitmap handle with any output function, but what appears to be the physical screen workstation instead (output overwriting the XaAES menu bar items).