[util] Fix cluster sweeping during --verify
If *I* get this wrong in 2017, I have no idea how others get their head around cluster math... Fixes tests/arabic-fallback-shaping.tests
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@ -366,13 +366,18 @@ struct shape_options_t : option_group_t
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}
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else
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{
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unsigned int cluster = info[end].cluster;
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if (forward)
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while (text_end < num_chars && text[text_end].cluster != cluster)
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{
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unsigned int cluster = info[end].cluster;
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while (text_end < num_chars && text[text_end].cluster < cluster)
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text_end++;
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}
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else
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while (text_start && text[text_start - 1].cluster != cluster)
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{
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unsigned int cluster = info[end - 1].cluster;
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while (text_start && text[text_start - 1].cluster >= cluster)
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text_start--;
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}
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}
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assert (text_start < text_end);
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