bug#32615: 27.0.50; Deadly signal in make-frame

[martin rudalics]

> It seems there is a problem when a float is being used as the parameter
> value of either `width' or `height' in a `make-frame' call: The X server
> reports a BadDrawable error and Emacs aborts.  This behaviour occurs
> deterministically in both window-managers I've tried, i.e. i3 and
> fluxbox.  A backtrace follows.

Does the attached patch fix it?  If so, I'll install it on the release
branch.  OK Eli?

Many thanks for the report, martin

xfns.c.diff
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