updated to 7.4.922

updated to 7.4.922

7.4.910  (after 7.4.905) compiler complains about type punned pointer
7.4.911  t_Ce and t_Cs are documented but not supported
7.4.912  wrong indenting for C++ constructor
7.4.913  no utf-8 support for the hangul input feature
7.4.914  new compiler warning: logical-not-parentheses
7.4.915  comma goes missing when removing from 'path' and then adding
7.4.916  when running out of memory, memory may be freed twice
7.4.917  compiler warning for comparing signed and unsigned
7.4.918  (after 7.4.907) a digit in an option name has problems
7.4.919  the dll options are not in the options window
7.4.920  the rubydll option is not in the options window
7.4.921  (after 7.4.906) missing proto file update
7.4.922  leaking memory with ":helpt {dir-not-exists}"