Backport of "jpegdec: Check return value of gst_buffer_map()" into 1.16
requested to merge tpm/gst-plugins-good:backport-mr-466-into-1.16-jpegdec-map-return-check into 1.16
Backport of !466 (merged) "jpegdec: Check return value of gst_buffer_map()".
Commits:
- 83e9d4f7 jpegdec: Check return value of gst_buffer_map()