Check of nMultiSpace is probably no longer relevant

The original code introduced with 1d10fb11 "New:
Text adjustment in multiportions" read

+            if( nMultiSpace < KSHRT_MAX )
+            {
+                pCurr->GetpSpaceAdd()->Insert(KSHORT(nMultiSpace),0);
+                bRet = sal_True;
+            }

so needed nMulitSpace to fit into KSHORT (an alias for USHORT back then),
whereas today nMultiSpace is inserted into a std::vector<long>.

Change-Id: I24cafa7e295b87bf93f4e0ef5fbda5f99834286a
Reviewed-on: https://gerrit.libreoffice.org/49034Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

sw/source/core/text/pormulti.cxx

@@ -515,8 +515,6 @@ bool SwDoubleLinePortion::ChgSpaceAdd( SwLineLayout* pCurr,
             if( nMyBlank )
                 nMultiSpace /= nMyBlank;
 
-            if( nMultiSpace < USHRT_MAX * SPACING_PRECISION_FACTOR )
-            {
 //            pCurr->SetLLSpaceAdd( nMultiSpace, 0 );
             // #i65711# SetLLSpaceAdd replaces the first value,
             // instead we want to insert a new first value:
@@ -525,7 +523,6 @@ bool SwDoubleLinePortion::ChgSpaceAdd( SwLineLayout* pCurr,
             bRet = true;
         }
     }
-    }
     return bRet;
 }
 // cancels the manipulation from SwDoubleLinePortion::ChangeSpaceAdd(..)