overrideFlexformSettingsIfEmpty does not work for hidePagination

[lisardo2]

in function override this code should override the settings from the flexform:

if (((!isset($previousData[$fieldName]) || (string)$previousData[$fieldName] === '') || (strlen($previousData[$fieldName]) === 0)) && isset($tsData['settings'][$fieldName]) ) {

hidePagination from the flexform is either 0 or 1 - never empty and never with strlen === 0. So this term above could not become true and therfore it is now impossible to override hidePagination

[responseinformationsdesign]

Seems to be similar to #421.

[georgringer]

@responseinformationsdesign wanna do a PR?