[glib] (12 commits) ...Merge branch 'fix_more_warnings' into 'master'

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  2e4524c... Add the G_OPTION_ENTRY_NULL macro to properly initialize GO
  f2d14a8... Fix missing field initializer warning in glib/tests/option-
  c65ec0b... Fix many missing initializers warnings in glib/tests/option
  f9904fe... Fix missing initializers warnings in glib/tests/utf8-valida
  66af256... Fix missing initializer warning in glib/tests/spawn-path-se
  689b9b5... Fix missing initializer warning in gio/tests/socket-server.
  4301110... Fix missing initializer warning in gio/tests/socket-client.
  27454ed... Fix missing initializer warning in gio/glib-compile-schemas
  c395e86... Fix missing initializer warning in gio/gio-tool-cat.c
  8a3e184... Fix missing initializer warning in gio/gio-tool-copy.c
  82fc86d... Fix missing initializer warning in gio/gio-tool-info.c
  53834ee... Merge branch 'fix_more_warnings' into 'master'