D191.id477.diff
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	Index: core/kernel/utility/email_send.php
	===================================================================
	--- core/kernel/utility/email_send.php
	+++ core/kernel/utility/email_send.php
	@@ -610,6 +610,24 @@
	}

	/**
	+ * Detects if such part already was added.
	+ *
	+ * @param array $part_definition Part definition.
	+ *
	+ * @return boolean
	+ */
	+ protected function HasPart(array $part_definition)
	+ {
	+ foreach ( $this->parts as $part ) {
	+ if ( $part === $part_definition ) {
	+ return true;
	+ }
	+ }
	+
	+ return false;
	+ }
	+
	+ /**
	* Returns text version of HTML document
	*
	* @param string $html
	@@ -780,6 +798,11 @@
	}

	$definition =& $this->GetFileDefinition($definition);
	+
	+ if ( $this->HasPart($definition) ) {
	+ return false;
	+ }
	+
	$part_number = $this->AddPart($definition);

	if ($inline) {