Scaling bugs when using HW encoder about lpms HOT 4 OPEN

I did some testing and logging. Here is how the Profile changes during the configuration phrase when Nvidia encoder is active (no such problems on SW encoder)

0 :  {ERROR 1000k 30 0 854x480 16:9 0 3 0s 0 0 0}
0 :  {ERROR 1000k 30 0 480x853 16:9 0 3 0s 0 0 0}

Please note that not only width and height got swapped, also 854 changed to 853. I need to check in standard but AFAIR h.264 doesn't support odd cropping rectangles and so scaling/encoding may be going south on this one (showing green rectangle)

Notes: it looks like ensureEncoderLimits function may be reason for all this. Because:

1. In Clamp method resolution is swapped if it is portrait, and...
2. ...there are also floating point operations which may contribute to the dimensions being decreased by one due to rounding errors

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Great find @MikeIndiaAlpha. Tagging @AlexKordic as he is the one who last worked on landscape-portrait and resolution clamping.

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I spent some more time working on this and come up with the solution that I hope is not too disruptive: #354

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Diederick working on this - dec' 22

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