/* allocate it and put its length and index into the value */
value=
- (((uint32_t)m->uLen+UCNV_EXT_TO_U_LENGTH_OFFSET)<<UCNV_EXT_TO_U_LENGTH_SHIFT)|
+ (((uint32_t)u16Length+UCNV_EXT_TO_U_LENGTH_OFFSET)<<UCNV_EXT_TO_U_LENGTH_SHIFT)|
((uint32_t)utm_countItems(extData->toUUChars));
u=utm_allocN(extData->toUUChars, u16Length);