bug#14233: 24.3; Don't constrain frame size to character multiples

[martin rudalics]

>> The interface to the window subsystem will be the function
>>
>> change_frame_size (struct frame *f, int new_width, int new_height,
>>                   bool pretend, bool delay, bool safe, bool pixelwise)
>>
>> which processes new_width and new_height in terms of pixels if pixelwise
>> is non-nil.

I meant 1 here.

> This is insane. it means changing lots and lots of calls, and makes merging 
between branches harder.

Currently, change_frame_size doesn't know anything about the various
platforms' requirements going beyond those of the frame's text area.

> Make a new function (change_frame_size_pixelwise for example), with the 
arguments above, and let change_frame_size call it with the last argument false.

And how would change_frame_size know what the new pixel dimensions of
the frame's text area are?

martin