updated for version 7.3.855
Problem:    Compiler warnings.
Solution:   Add type casts. (Mike Williams)
Added tag v7-3-855 for changeset 6604853dd822
updated for version 7.3.856
Problem:    When calling system() multi-byte clipboard contents is garbled.
Solution:   Save and restore the clipboard contents.  (Yukihiro Nakadaira)
Added tag v7-3-856 for changeset fb533fb6c015