(previous variant return NULL pointer for both empty file case and error case, so caller can't sense error properly). It not affect existen programs because property_find() now returns NULL for both NULL pointer and NULLified struct.
(previous variant return NULL pointer for both empty file case and error case, so caller can't sense error properly). It not affect existen programs because property_find() now returns NULL for both NULL pointer and NULLified struct.