tdf#120703 PVS: silence a V555

V555 The expression '(curpos - bufpos) > 0' will work as 'curpos != bufpos'.

Change-Id: I432c10c9c5ecc99293ec3f03f6e1a660e1c47e28
Reviewed-on: https://gerrit.libreoffice.org/63236
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/sal/osl/w32/file.cxx b/sal/osl/w32/file.cxx
index a5e6c64..1bc898e 100644
--- a/sal/osl/w32/file.cxx
+++ b/sal/osl/w32/file.cxx
@@ -475,7 +475,7 @@
        if (curpos >= m_buflen)
        {
            /* buffer examined */
            if ((curpos - bufpos) > 0)
            if (curpos > bufpos) // actually, curpos can't become less than bufpos, so != could do
            {
                /* flush buffer to sequence */
                result = writeSequence_Impl(