tree f0bccad870590cf479c98593a9d62eccf88c3f17
parent 517a4f93b7032b06ff69488a70dbcb9ad8f02c6f
author Xiao Deng <354667891@qq.com> 1590364426 +0200
committer Nikias Bassen <nikias@gmx.li> 1590364426 +0200

Return NULL from plist_copy() if passed a NULL pointer

This will prevent an assert if a NULL pointer is passed, and can make
writing some code easier and cleaner without the need for a NULL check.
For example, plist_copy(plist_dict_get_item(dict, "abc")) would give us
a copy of the dict's node if the dict has a value for the given key, or
NULL without any further checks.