Revert "ListBox: refuse to give values before we are loaded"
Revert "ListBox: refuse to give values before we are loaded"

This reverts commit 1cc29a04adb721205655091854f5ea828bb8eb11, as it caused
JunitTest_forms_unoapi trigger the

  assert( m_nConvertedBoundValuesType == getValueType())

at forms/source/component/ListBox.cxx:1189.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core