fixed php 7.2 count error
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@ -311,7 +311,7 @@ class Mail_mimePart
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{
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$encoded =& $this->encoded;
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if (count($this->subparts)) {
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if ($this->subparts && count($this->subparts)) {
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$boundary = $boundary ? $boundary : '=_' . md5(rand() . microtime());
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$eol = $this->eol;
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