Update dolgraph.class.php
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@ -533,7 +533,7 @@ class DolGraph
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$vals = array();
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$nblines = count($this->data);
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$nbvalues = (! empty($this->data[0]) ? count($this->data[0]) - 1 : 0);
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$nbvalues = (empty($this->data[0]) ? 0 : count($this->data[0]) - 1);
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for ($j = 0; $j < $nblines; $j++)
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{
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@ -562,7 +562,7 @@ class DolGraph
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$vals = array();
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$nblines = count($this->data);
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$nbvalues = (! empty($this->data[0]) ? count($this->data[0]) - 1 : 0);
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$nbvalues = (empty($this->data[0]) ? 0 : count($this->data[0]) - 1);
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for ($j = 0; $j < $nblines; $j++)
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{
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