USHRT_MAX -> SAL_MAX_UINT16

...presumably forgotten when the following cast of nRepeat in the
SetRowsToRepeat call was changed from USHORT to sal_uInt16 in
7f33ed41 "removetooltypes01: #i112600# Remove
tools types from sw"

Change-Id: I3d1932215778977e40cc68fd3aad73477715c214
Reviewed-on: https://gerrit.libreoffice.org/48467Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>

sw/source/core/unocore/unotbl.cxx

@@ -230,7 +230,7 @@ static void lcl_SetSpecialProperty(SwFrameFormat* pFormat,
             {
                 sal_Int32 nRepeat = 0;
                 aValue >>= nRepeat;
-                if( nRepeat >= 0 && nRepeat < USHRT_MAX )
+                if( nRepeat >= 0 && nRepeat < SAL_MAX_UINT16 )
                     pFormat->GetDoc()->SetRowsToRepeat( *pTable, static_cast<sal_uInt16>(nRepeat) );
             }
         }