hasExtractedFont stacktraces when font name is null

[helcat]

hasExtractedFont stacktraces when font name is null.
Fixed with below. Overriding PdfFontExtractor class to fix the error at the moment.
protected boolean hasExtractedFont(PDFont font) {
for (PDFont fontOn : extractedFonts) {
if (fontOn == null || fontOn.getName() == null)
return false;
if (font == null || font.getName() == null)
return false;
if (fontOn.getName().equals(font.getName()) && fontOn.getClass() == font.getClass())
return true;
}
return false;
}

JavaFX CSS Reference Guide.pdf