use-of-uninitialized-value in gmpz sub ui

use-of-uninitialized-value in gmpz sub ui: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). MemorySanitizer: use-of-uninitialized-value in function gmpz sub ui in file gmp/mpz/aors ui.h