Added support of PdfIndirectObject for coordinates in /Rect, /BBox

[sa-sh]

Description of the Bugfix

If annotation has /Rect which constist of PdfIndirectReference instead of PdfNumber, form flattening does not work
It throws exception like:

java.lang.IllegalArgumentException: Invalid argument. Float value (coordinate) expected! But was 8 0 R

	at com.lowagie.text.pdf.PdfRectangle.convertToFloat(PdfRectangle.java:169)
	at com.lowagie.text.pdf.PdfRectangle.<init>(PdfRectangle.java:163)
	at com.lowagie.text.pdf.PdfStamperImp.flatFields(PdfStamperImp.java:983)
	at com.lowagie.text.pdf.PdfStamperImp.close(PdfStamperImp.java:224)
	at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:397)

Unit-Tests for the new Feature/Bugfix

[+] Unit-Tests added to cover the bug

Testing details

For testing added PDF that causes issue during form flattening,
with this fix - test passed

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[sa-sh]

is "1.3-java8" branch still open for bugfixes ?

[asturio]

is "1.3-java8" branch still open for bugfixes ?

Yes.

[asturio]

@sa-sh You may also cherry-pick these changes to 1.4 and master, so the newer versions have also the fixes.

[sa-sh]

thank you, i will create another PR for master