Log Message:
Update to 4.3.48:

* Fixed bug 135064. Changing the sign of a large number (when "Show
  Thousands Separator" is on and this is not the C locale), no longer
  corrupts the display.

  My special thanks to Miloslav Trmac for fixing this problem in a
  really elegant manner. This is an important change to the way that
  numbers are displayed.

  The fix involved resetting all the internal calculations in gcalctool
  to be done in the C locale, and then localized (radix character and
  thousands separator), just before the number is displayed.

  I'd appreciate it if everybody could give this a good thrashing in as
  many locales as possible to make sure that it's fully working.

* Fixed bug 135328. Added Shift-slash as a recognized alternate for the
  divide operation (needed by the be-latin1 keyboard layout).