ggml-org/llama.cpp b10947

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models : guard the expert FFN size fallback in nemotron-h against a zero divisor (#28779)

The NextN/MTP tail loop derives the expert FFN size as n_ff/n_expert_used
when expert_feed_forward_length gives nothing for the layer. Both values come
from per-layer arrays that legitimately hold 0 on layers that are not MoE, so
a checkpoint whose predict layers hold 0 in both divides by zero and dies with
SIGFPE at load time, with no error message. Report the malformed metadata
instead.