Added some declaration to be able to compile the sources with gcc 5.4.0.

src/qml_interaction/attachment_data.h

@@ -75,6 +75,16 @@ public:
 	    const QString &_dmFileSize, const QString &_dmDownloadDate,
 	    const QString &_icon, QObject *parent = Q_NULLPTR);
 
+	/*!
+	 * @brief Assignment operator.
+	 *
+	 * @note gcc 5.4 bitches about missing operator= declaration.
+	 *
+	 * @param[in] data Attachment data.
+	 * @return Reference to itself.
+	 */
+	AttachmentData &operator=(const AttachmentData &data);
+
 	int fileId(void) const;
 	void setFileId(int fileId);
 	qint64 dmId(void) const;

src/qml_interaction/message_envelope.h

@@ -143,6 +143,16 @@ public:
 	    bool _dmReadLocally,
 	    QObject *parent = Q_NULLPTR);
 
+	/*!
+	 * @brief Assignment operator.
+	 *
+	 * @note gcc 5.4 bitches about missing operator= declaration.
+	 *
+	 * @param[in] envel Message envelope.
+	 * @return Reference to itself.
+	 */
+	MsgEnvelope &operator=(const MsgEnvelope &envel);
+
 	qint64 dmID(void) const;
 	void setDmID(qint64 dmID);
 	QString dmAnnotation(void) const;