longparas: remove now broken STRING_LEN uses

Change-Id: I89799855925b7c246262ae56c2637e20e51cffee
longparas: expand STRING_LEN to text length locally

Change-Id: I9ffdabdc44677033d8c8ac1b025ccb7c600db664
longparas: xub_Strlen->sal_Int32

Change-Id: Ib33b2a36e7fcd96ca9e5deff19e1d2d18aebd012
xub_StrLen->sal_Size

Change-Id: Iac6b7a01dd35fb6bb350644235409c4019a0a086
longparas: drop STRING_MAXLEN use now

Change-Id: Iaaca13e732c234e9051be0ab66a7625f9c106eea
comment is wrong now with conversion to OUString

Change-Id: Iff26cd2c966fc747895fbde7229a457a99c62f7a
longparas: bump nLen to 32bit

Change-Id: I49621bc3887baf8fcee17559818193325b83f27d
sal_uLong->size_t

Change-Id: Id10a0d7e0d635a6829966dc5ce0110dc715d7c6c
longparas: drop wrong xub_StrLen casts now

Change-Id: I720b921367ad810e3d775155535c1e05ab5f6f2c