Problem:    GTK: Input method popup displayed on wrong screen.
Solution:   Add the screen position offset. (Ken Takata, closes #3268)

Problem:    "safe" argument of call_vim_function() is always FALSE.
Solution:   Remove the argument.

Problem:    Unicode standard was updated.
Solution:   Include the changes. (Christian Brabandt)

Problem:    Complete test has wrong order of arguments. Wrong type for
            sentinel variable.
Solution:   Swap arguments, use VAR_UNKNOWN. (Ozaki Kiichi)

Problem:    The first argument given to 'completefunc' can be Number or
            String, depending on the value.
Solution:   Avoid guessing the type of an argument, use typval_T in the
            callers of call_vim_function(). (Ozaki Kiichi, closes #2993)

Problem:    compiler warning for unused arguments and missing prototype
Solution:   Add UNUSED.  Add static.

Problem:    No compiler warning for wrong format in vim_snprintf().
Solution:   Add printf attribute for gcc.  Fix reported problems.

Problem:    Too many #ifdefs.
Solution:   Graduate the +autocmd feature. Takes away 450 #ifdefs and
            increases code size of tiny Vim by only 40 Kbyte.

Problem:    Various small problems in source files.
Solution:   Fix the problems.

Problem:    Clearing a pointer takes two lines.
Solution:   Add VIM_CLEAR() and replace vim_clear(). (Hirohito Higashi,
            closes #2629)