patch 8.0.0424: compiler warnings on MS-Windows

Problem:    Compiler warnings on MS-Windows. (Ajit Thakkar)
Solution:   Add type casts.

patch 8.0.0423: changing 'cinoptions' does not always work

Problem:    The effect of adding "#" to 'cinoptions' is not always removed.
            (David Briscoe)
Solution:   Reset b_ind_hash_comment. (Christian Brabandt, closes vim#1475)

patch 8.0.0422: Python test fails with Python 3.6

Problem:    Python test fails with Python 3.6.
Solution:   Convert new exception messages to old ones. (closes vim#1359)

patch 8.0.0421: diff mode wrong when adding line at end of buffer

Problem:    Diff mode is displayed wrong when adding a line at the end of a
            buffer.
Solution:   Adjust marks in diff mode. (James McCoy, closes vim#1329)

patch 8.0.0420: text garbled when the system encoding differs from 'e…

…ncoding'

Problem:    When running :make the output may be in the system encoding,
            different from 'encoding'.
Solution:   Add the 'makeencoding' option. (Ken Takata)

patch 8.0.0419: test for v:progpath fails on MS-Windows

Problem:    Test for v:progpath fails on MS-Windows.
Solution:   Expand to full path.  Also add ".exe" when the path is an absolute
            path.

patch 8.0.0418: ASAN logs are disabled

Problem:    ASAN logs are disabled and don't cause a failure.
Solution:   Enable ASAN logs and fail if not empty. (James McCoy,
            closes vim#1425)

patch 8.0.0417: test for the clipboard fails sometimes

Problem:    Test for the clipboard fails sometimes.
Solution:   Add it to the flaky tests.

patch 8.0.0416: setting v:progpath is not quite right

Problem:    Setting v:progpath is not quite right.
Solution:   On MS-Windows add the extension. On Unix use the full path for a
            relative directory. (partly by James McCoy, closes vim#1531)

patch 8.0.0415: balloon test fails on MS-Windows

Problem:    Balloon test fails on MS-Windows.
Solution:   Test with 0x7fffffff instead of 0xffffffff.