use-of-uninitialized-value in get words lossless

use-of-uninitialized-value in get words lossless: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). MemorySanitizer: use-of-uninitialized-value in function get words lossless in file wavpack/src/read words.c