find_histogram_index() is being called from ebur128_gated_loudness() when not using histogram mode

[DarenFord]

The following code in ebur128_gated_loudness() is calling find_histogram_index() unconditionally (whether histogram mode is specified or not):

if (relative_threshold < histogram_energy_boundaries[0]) {
start_index = 0;
} else {
start_index = find_histogram_index(relative_threshold);
if (relative_threshold > histogram_energies[start_index]) {
++start_index;
}
}

As a local fix, I have moved this block of code so that the function is only called when histogram mode is specified:

for (i = 0; i < size; i++) {
if (!sts[i]) continue;
if (sts[i]->d->use_histogram) {
if (relative_threshold < m_dHistogramEnergyBoundaries[0]) {
start_index = 0;
} else {
start_index = find_histogram_index(relative_threshold);
if (relative_threshold > m_dHistogramEnergies[start_index]) {
++start_index;
}
}
for (j = start_index; j < 1000; ++j) {
gated_loudness += sts[i]->d->block_energy_histogram[j] * m_dHistogramEnergies[j];
above_thresh_counter += sts[i]->d->block_energy_histogram[j];
}
} else {
STAILQ_FOREACH(it, &sts[i]->d->block_list, entries) {
if (it->z >= relative_threshold) {
++above_thresh_counter;
gated_loudness += it->z;
}
}
}
}