gnumeric: update to 1.12.44.

Gnumeric 1.12.44

Jean:
* Fix document properties types. [#367]
* Call pygobject_init() if needed. [#368]

Morten:
* Fix SWITCH's default argument.  [#354]
* Fix problem with setting auto-func.  [#357]
* Fix problem reading really old xls format.
* Fix sheet filter problem.  [#359]
* New NT_RADICAL function.
* Fix conditional style crash.
* Fix applix locale problem.  [#362]
* Fix applix encoding and escape problems.  [#363]
* New LAMBERTW function.
* Plug sheet object leak with paste.
* Fix documentation problem for vararg functions.

(wiz)