Font.php: hot fix for calculateTextWidth in case Widths key is not set #562

Job	Run time
Tests alternative autoloader (PHP 7.1)	9s
PHPUnit (PHP 7.2)	31s
Tests alternative autoloader (PHP 7.2)	11s
PHPUnit (PHP 7.3)	30s
PHPUnit Composer v2 (PHP 7.4)	28s
PHPUnit coverage (PHP 7.4)	1m 3s
Tests alternative autoloader (PHP 7.3)	8s
PHPUnit (PHP 7.4)	20s
Tests alternative autoloader (PHP 7.4)	8s
PHPUnit (PHP 8.0)	19s
PHPUnit (PHP 7.1)	20s
Tests alternative autoloader (PHP 8.0)	12s
PHPUnit lowest deps (PHP 7.3)	30s
PHPUnit (PHP 8.1)	25s
Tests alternative autoloader (PHP 8.1)	11s
PHPUnit (PHP 8.2)	35s
Tests alternative autoloader (PHP 8.2)	9s
PHPUnit (PHP 8.3)	29s
Tests alternative autoloader (PHP 8.3)	22s
Windows-Tests with PHP 7.1	1m 3s
Windows-Tests with PHP 7.2	46s
Windows-Tests with PHP 7.3	56s
Windows-Tests with PHP 7.4	43s
Windows-Tests with PHP 8.0	59s
Windows-Tests with PHP 8.1	57s
Windows-Tests with PHP 8.2	48s
Windows-Tests with PHP 8.3	53s
	14m 5s

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