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Make sure that caret width is not null in mathed
The same test exists in texted. Fixes bug #12904.
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@ -298,7 +298,7 @@ void MathData::metrics(MetricsInfo & mi, Dimension & dim, bool tight) const
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// so that we can set the caret vertical dimensions.
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// so that we can set the caret vertical dimensions.
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mrow.caret_dim.asc = min(dim.asc, fm.maxAscent());
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mrow.caret_dim.asc = min(dim.asc, fm.maxAscent());
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mrow.caret_dim.des = min(dim.des, fm.maxDescent());
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mrow.caret_dim.des = min(dim.des, fm.maxDescent());
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mrow.caret_dim.wid = fm.lineWidth();
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mrow.caret_dim.wid = max(fm.lineWidth(), 1);
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/// do the same for math cells linearized in the row
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/// do the same for math cells linearized in the row
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MathRow caret_row = MathRow(mrow.caret_dim);
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MathRow caret_row = MathRow(mrow.caret_dim);
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