IN: Buffer that was used to read in variable-length packets.
When variable-length packets are read, memory is automatically allocated to hold them, and must be freed. H5PTfree_vlen_buff frees this memory, and should be called whenever packets are read from a variable-length packet table.
Returns a non-negative value on success or a negative value on error.
1.10.0 and 1.8.17
Function re-introduced. Function had been removed in 1.8.3.