Fix ownership issue for string_pointer and buffer overrun issue for string_array. (#472) #474
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This fixes the issue(#472) of Python string object pointer being directly set during use of string_pointer and mitigates the problem of buffer overrun when using string_array at instance/pointer_attribute.
This change will cause memory leak when using string_pointer if the string is not properly managed, but this is necessary to maintain memory safety in statements such as
pointer.set_string_pointer("string")
.