bug on function [parse_array]

[dangyajun]

Lines from 1514-1516 in function parse_array should be removed. These code will be sure the previous member of the child of cJSON object's. That means : the code of condition "NULL != parse_array("[[]]")->child->prev" is always true. Besides, all tests is passed after remove the three line code.

[dangyajun]

Sorry for the poor english and wrong grammar.