Index is not needed for single getToken call

Change-Id: I98e90e817782dbd1776a053a9a0fd098a8d2be9d
Reviewed-on: https://gerrit.libreoffice.org/66641
Tested-by: Jenkins
Reviewed-by: Matteo Casalin <matteo.casalin@yahoo.com>

vcl/unx/generic/app/geninst.cxx

@@ -65,9 +65,8 @@ OUString SalGenericInstance::getOSVersion()
         if ( fgets ( aVerBuffer, 511, pVersion ) )
         {
             aKernelVer = OUString::createFromAscii( aVerBuffer );
-            sal_Int32 nIndex = 0;
             // "Linux version 3.16.7-29-desktop ..."
-            OUString aVers = aKernelVer.getToken( 2, ' ', nIndex );
+            OUString aVers = aKernelVer.getToken( 2, ' ' );
             // "3.16.7-29-desktop ..."
             sal_Int32 nTooDetailed = aVers.indexOf( '.', 2);
             if (nTooDetailed < 1 || nTooDetailed > 8)