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(Foverlays_at, Fnext_overlay_change): Don't use NULL.
(Fprevious_overlay_change): Don't use NULL.
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@ -2313,7 +2313,8 @@ DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0,
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/* Put all the overlays we want in a vector in overlay_vec.
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Store the length in len. */
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, NULL);
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
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(int *) 0, (int *) 0);
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/* Make a list of them all. */
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result = Flist (noverlays, overlay_vec);
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@ -2343,7 +2344,8 @@ If there are no more overlay boundaries after POS, return (point-max).")
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/* Put all the overlays we want in a vector in overlay_vec.
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Store the length in len.
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endpos gets the position where the next overlay starts. */
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos, NULL);
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
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&endpos, (int *) 0);
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/* If any of these overlays ends before endpos,
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use its ending point instead. */
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@ -2383,7 +2385,8 @@ If there are no more overlay boundaries after POS, return (point-min).")
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/* Put all the overlays we want in a vector in overlay_vec.
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Store the length in len.
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prevpos gets the position of an overlay end. */
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, NULL, &prevpos);
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noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
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(int *) 0, &prevpos);
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/* If any of these overlays starts before endpos,
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maybe use its starting point instead. */
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