updated for version 7.3.1107
Problem:    Compiler warnings for unused variables.
Solution:   Put the variables inside #ifdef.
Added tag v7-3-1107 for changeset bd6bef0bd0fb
updated for version 7.3.1108
Problem:    Error message for os.fchdir() (Charles Peacech)
Solution:   Clear the error. (ZyX)
Added tag v7-3-1108 for changeset 3534e9b4fa42
updated for version 7.3.1109
Problem:    Building on MS-Windows doesn't see changes in if_py_both.h.
Solution:   Add a dependency. (Ken Takata)
Added tag v7-3-1109 for changeset 450e13fe1621