tdf#112393: avoid leak in LangSelectHdl_Impl (cui)

by deleting userdata of entries containing in m_pModulesCLB

Change-Id: Ie903b0cd0ccf16839ac7bed42b7bdbc1db4fa5ef
Reviewed-on: https://gerrit.libreoffice.org/42308Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

cui/source/options/optlingu.cxx

@@ -1823,6 +1823,8 @@ void SvxEditModulesDlg::dispose()
     delete pDefaultLinguData;
     pDefaultLinguData = nullptr;
     m_pLanguageLB.clear();
+    for(sal_uLong i = 0; i < m_pModulesCLB->GetEntryCount(); i++)
+        delete static_cast<ModuleUserData_Impl*>(m_pModulesCLB->GetEntry(i)->GetUserData());
     m_pModulesCLB.clear();
     m_pPrioUpPB.clear();
     m_pPrioDownPB.clear();