bug#19428: 25.0.50; Frame is wider (in chars) than normal non-deterministically

[martin rudalics <rudalics@gmx.at>]

The following excerpts are from
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19428#18.  Sorry, but
gmx.de refused to pass on some of the previous postings.

 > I was able to bisect this problem to commit
 > 3477e27021dbe9366c3c1aaba80feb72f1138b29
 >
 > "Complete pixelwise frame/window resizing, add horizontal scrollbar
 > support."

Thanks for bisecting this.  Highly appreciated (even if the result was
somewhat predictable).

 > Good:
 >
 > [good.txt (text/plain, inline)]
 >
 > frame pixel: 756 x 682   cols/lines: 84 x 34   units: 9 x 19
 > frame text pixel: 720 x 646   cols/lines: 80 x 34
 > tool: 36  scroll: 18/0  fringe: 16  border: 1  right: 0  bottom: 0
 > [...]
 > Bad:
 >
 > [bad.txt (text/plain, inline)]
 >
 > frame pixel: 792 x 720   cols/lines: 88 x 36   units: 9 x 19
 > frame text pixel: 756 x 684   cols/lines: 84 x 36
 > tool: 36  scroll: 18/0  fringe: 16  border: 1  right: 0  bottom: 0

The good and bad values are so hilariously different that some silly
code must have been at work here.  I checked in a fix on master/trunk
with commit 8c38c2b77a5f0b256948bda0d3f9b6272483a42d.  Please try it.

Thanks for all your work on this, martin