libFLAC/lpc_intrin_sseN.c : Disambiguate macro names.

Previously, the files lpc_intrin_sse2.c and lpc_intrin_sse41.c both defined
macros RESIDUAL_RESULT and DATA_RESULT. This situation made it impossible
to merge these files which we may do at some stage.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
2 files changed