longparas: remove now broken STRING_LEN uses

Change-Id: Ie2de4680e07e26416fc52d4c22b5bececb190cc1
longparas: nPartLen always is USHRT_MAX/STRING_LEN to take full string

Change-Id: I55bb0baa8e83948c470ade2fc6fabccb69dea91d
xub_StrLen->sal_Int32

Change-Id: I9c4d9b8d18b36dda6609b1976cae13a481943563
Resolves: #i119844# Spin effect amount property lost when saving pptx to odp

(cherry picked from commit a7eedd28dd66cec1a668c3df6a8568dcad0f858f)

Change-Id: Ia2b46f4b35fc90723570b7f8bfb82c101279eb9d
Related: #i119844# align from/to types with DFF_msofbtAnimateRotationData

Change-Id: I43bf12b69892614a6054a14de76bbbd4e46c2ee9