More likely month pos first

Change-Id: I0033c176071642f8df245307af79b8505644a004
diff --git a/basic/source/runtime/methods.cxx b/basic/source/runtime/methods.cxx
index 43548c0..f016638 100644
--- a/basic/source/runtime/methods.cxx
+++ b/basic/source/runtime/methods.cxx
@@ -2092,7 +2092,7 @@ RTLFUNC(CDateFromIso)
                if (!comphelper::string::isdigitAsciiString(aStr))
                    break;

                const sal_Int32 nMonthPos = (nLen == 6 ? 2 : (nLen == 9 ? 5 : 4));
                const sal_Int32 nMonthPos = (nLen == 8 ? 4 : (nLen == 6 ? 2 : 5));
                if (nMonthPos == 2)
                    bUseTwoDigitYear = true;
                aYearStr  = aStr.copy( 0, nMonthPos );