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Ben Younes
eacbd8234c
whisper_full()/whisper_full_with_state() only compute the mel spectrogram when n_samples > 0. For n_samples == 0 on a freshly allocated state the mel is never touched, but struct whisper_mel had no member initializers, so n_len / n_len_org / n_mel were indeterminate heap garbage (the state is allocated with new whisper_state). seek_end is derived from that garbage and, depending on it, the call either quietly returns 0 or runs the encoder with garbage dimensions over an empty (NULL) mel buffer, dereferencing address 0 in the mel copy loop. Give whisper_mel default member initializers so a never-computed mel reads as 0 frames and the n_samples == 0 case deterministically takes the existing too-short path. Fixes #3978