qc_mysqlembedded excludes some fields, when reporting affected fields

qc_myselembedded does not report all affected fields.

For instance, for a query like SELECT a from X where b = 1 and c = 2; it will correctly report "a b c". However, for a query like SELECT a from X where b = 1 and c = 2 and d = 3; it will incorrectly also report "a b c" although it should report "a b c d".