[BUGFIX] noImage_stdWrap only working with optionSplit

Fix problem with "noImage_stdWrap" if imageMarkerOptionSplit is not set.

Change-Id: I4e80918d5f4fe983ebf7b0f040195d4d5b5a533e
Resolves: #56113
Reviewed-on: https://review.typo3.org/27720
Reviewed-by: Rupert Germann
Tested-by: Rupert Germann