Make all values count

[Etua]

Currently raptor10.c contains many arguments to the functions which are never accessed or variables which are assigned value and again, ignored later.
While it would be trivial to simply delete them, they might indicate incomplete implementation of the RFC. For this reason, they should be reviewed one by one. Not to overcrowd the issue list, I created a list of functions to review. An element should be marked as complete, once all arguments and variables are accessed or it is clearly stated in the comment why they are not.

• r10_Trip
• r10_build_LDPC_submat (initial value is instantly overwritten)
• r10_build_Half_submat
• r10_build_LT_mat
• r10_LTEnc
• r10_decode