Display emoticons as images -filter prevents pdf export

[Urpokarhu1]

Hello,

tested with:

• Moodle 3.9.12 (Build: 20220117)
• Mod_questionnaire 3.9.0 (Build - 2020062300)
  2020062301

if you use filter "Display emoticons as images" and user add emoticon f.ex :) to their answer and then you press "export to PDF" you get an error

Exception - TCPDF ERROR: [Image] Unable to get the size of the image: Unable to get the size of the image: http://moodleaddress.com/theme/image.php/boost/core/1646034665/s/smiley

Error code: generalexceptionmessage

Stack trace: line 2950 of /lib/tcpdf/tcpdf.php: Exception thrown line 6917 of /lib/tcpdf/tcpdf.php: call to TCPDF->Error() line 18981 of /lib/tcpdf/tcpdf.php: call to TCPDF->Image() line 18344 of /lib/tcpdf/tcpdf.php: call to TCPDF->openHTMLTagHandler() line 5859 of /lib/tcpdf/tcpdf.php: call to TCPDF->writeHTML() line 18276 of /lib/tcpdf/tcpdf.php: call to TCPDF->MultiCell() line 640 of /mod/questionnaire/report.php: call to TCPDF->writeHTML()