patch 7.4.922

Problem:    Leaking memory with ":helpt {dir-not-exists}".
Solution:   Free dirname. (Dominique Pelle)

patch 7.4.921

Problem:    Missing proto file update. (Randall W. Morris)
Solution:   Add the missing line for mch_ishidden.

patch 7.4.920

Problem:    The rubydll option is not in the options window.
Solution:   Add the rubydll option.

patch 7.4.919

Problem:    The dll options are not in the options window.
Solution:   Add the dll options.  And other fixes.

patch 7.4.918

Problem:    A digit in an option name has problems.
Solution:   Rename 'python3dll' to 'pythonthreedll'.

patch 7.4.917

Problem:    Compiler warning for comparing signed and unsigned.
Solution:   Add a type cast.

patch 7.4.916

Problem:    When running out of memory while copying a dict memory may be
            freed twice. (ZyX)
Solution:   Do not call the garbage collector when running out of memory.

patch 7.4.915

Problem:    When removing from 'path' and then adding, a comma may go missing.
            (Malcolm Rowe)
Solution:   Fix the check for P_ONECOMMA. (closes vim#471)

patch 7.4.914

Problem:    New compiler warning: logical-not-parentheses
Solution:   Silence the warning.

patch 7.4.913

Problem:    No utf-8 support for the hangul input feature.
Solution:   Add utf-8 support. (Namsh)