Minor performance optimisation: use $x+=3 instead of $x=$x+3
git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@83576 2327b42d-5241-43d6-9e2a-de5ac946f064
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@ -181,9 +181,9 @@ class PHPExcel_Shared_Date
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// Julian base date Adjustment
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if ($month > 2) {
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$month = $month - 3;
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$month -= 3;
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} else {
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$month = $month + 9;
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$month += 9;
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--$year;
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}
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