[TASK] Add unit test to cover stdWrap_numRows

Resolves: #76736
Releases: master
Change-Id: I32d29db377eacc4f01b5344d4608caefaa6fff51
Reviewed-on: https://review.typo3.org/48639


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>