SLD saving ignores setting for exporting polygon fills as png tiles

[Jeroen-GroeneBij]

What is the bug or the crash?

In QGIS 3.34 when saving a style as SLD there is an optional setting to "Export polygon fills as png tiles"

When saving a line pattern fill, the png tiles is always saved along with the .sld and completely disregarding the setting.
With a simple fill, there is no png exported, not even when the option is checked.

I have not tested this with other symbol types.

Steps to reproduce the issue

In QGIS 3.34 on Windows 10
save a styling (simple fill, or line pattern fill) as .sld
Check or uncheck the checkbox for "Export polygon fills as png tiles" and see wether a png file is created in the same folder as the .sld

Versions

<style type="text/css"> p, li { white-space: pre-wrap; } </style>

QGIS version	3.34.3-Prizren	QGIS code revision	4737323
Qt version	5.15.3
Python version	3.9.18
GDAL/OGR version	3.8.3
PROJ version	9.3.1
EPSG Registry database version	v10.098 (2023-11-24)
GEOS version	3.12.1-CAPI-1.18.1
SQLite version	3.41.1
PDAL version	2.6.0
PostgreSQL client version	15.2
SpatiaLite version	5.1.0
QWT version	6.1.6
QScintilla2 version	2.13.4
OS version	Windows 10 Version 2009
Active Python plugins
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

QGIS version 3.34.3-Prizren QGIS code revision [4737323](https://github.com/qgis/QGIS/commit/47373234ac) Qt version 5.15.3 Python version 3.9.18 GDAL/OGR version 3.8.3 PROJ version 9.3.1 EPSG Registry database version v10.098 (2023-11-24) GEOS version 3.12.1-CAPI-1.18.1 SQLite version 3.41.1 PDAL version 2.6.0 PostgreSQL client version 15.2 SpatiaLite version 5.1.0 QWT version 6.1.6 QScintilla2 version 2.13.4 OS version Windows 10 Version 2009

Active Python plugins
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response