use-of-uninitialized-value in print insn metag

use-of-uninitialized-value in print insn metag: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). MemorySanitizer: use-of-uninitialized-value in function print insn metag in file binutils-gdb/opcodes/metag-dis.c