bsc CBSP: fix tr_CBSP_KILL_FAIL, no lengthof() on record-of with '*'

Keep a local next_idx so that lengthof() doesn't fail after adding a '*' entry.
Fixes this error in BSC_Tests_CBSP.TC_cbsp_write_then_kill:

 Dynamic test case error: Performing lengthof() operation on a template of type @CBSP_Types.CBSP_IEs with no exact length.

Change-Id: I4d95a8ca311f145fa5ea371b6aed099db771d7b8
1 file changed