The patch looks good, but I didn't check if the new warnings trigger in any existing regression tests; if they do we probably want #pragma disable_warning in them.
Include HuC6280 port in Windows installer, fix bug #4114.
Add a test for a bug that was fixed a while ago along with a different one.
Remove some untested peephole optimizer rules, for which no tests were found, towards fixing bugs #4123, #4115.
Another test for z80 peephole optimizer rules, towards fixing bug #4123.
Fix bug #4125, patch by Christopher Bazley.
Fix bugs #4130, #4133; patches by Christopher Bazley.
Fix bug #4140, patch by Christopher Bazley.