Program should always fail if arch_version or program format does not satisfy the preconditions in the program.
However, the file merge_lora_into_ggml.py uses assert statements, sometimes being ignored under high optimization level.
We uses if-statements here, where those preconditions would always execute, whether the environment enable assert stateuements or not.

Signed-off-by: Pan Chen <chenpan321@qq.com>