gkeyfile: Clarify handling of out-of-range integers in documentation
gkeyfile: Clarify handling of out-of-range integers in documentation

Clarify that g_key_file_get_integer() and g_key_file_get_integer_list()
both return G_KEY_FILE_ERROR_INVALID_VALUE if used to load a valid
integer which is out of range for a gint.

johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib