Use indexed getToken

Change-Id: I104565b86874ed7cf99f85b9c784b3873e078ffa
Reviewed-on: https://gerrit.libreoffice.org/66937
Tested-by: Jenkins
Reviewed-by: Matteo Casalin <matteo.casalin@yahoo.com>

vcl/unx/generic/app/wmadaptor.cxx

@@ -821,8 +821,9 @@ bool WMAdaptor::getNetWmName()
                                         )
                                     {
                                         OUString aMetaVersion( reinterpret_cast<char*>(pProperty), nItems, RTL_TEXTENCODING_UTF8 );
-                                        nVersionMajor = aMetaVersion.getToken(0, '.').toInt32();
-                                        nVersionMinor = aMetaVersion.getToken(1, '.').toInt32();
+                                        sal_Int32 nIdx {0};
+                                        nVersionMajor = aMetaVersion.getToken(0, '.', nIdx).toInt32();
+                                        nVersionMinor = aMetaVersion.getToken(0, '.', nIdx).toInt32();
                                     }
                                     if( pProperty )
                                     {