some members of drizzle_result_st are uninitialized

version: drizzle-7.1.36 , drizzle-7.2.3
file : libdrizzle-2.0/structs.h

the constructor function of drizzle_result_st have not initialize all it's members , and will cause program crash .
uninitialized members include info ,sqlstate ,field , field_buffer ,row .

fixed code:
  drizzle_result_st() :
    con(NULL),
    next(NULL),
    prev(NULL),
    options(DRIZZLE_RESULT_NONE),
    error_code(0),
    insert_id(0),
    warning_count(0),
    affected_rows(0),
    column_count(0),
    column_current(0),
    column_list(NULL),
    column(NULL),
    column_buffer(NULL),
    row_count(0),
    row_current(0),
    field_current(0),
    field_total(0),
    field_offset(0),
    field_size(0),
    field(NULL),
    field_buffer(NULL),
    row_list_size(0),
    row(NULL),
    row_list(NULL),
    field_sizes(NULL),
    field_sizes_list(NULL)
  { info[0] = '\0' ; sqlstate[0]='\0';}