pointlist: opaque mem pointer rather than readonly attribute
pc_patch_uncompressed_readonly: transfers data ownership
pc_pointlist_from_dimensional: 1 pcalloc/patch rather than 1/point
* Remove unused function in pc_patch_ght.c
* Remove unused vars in pc_patch_lazperf.c
* Remove unused vars in cu_pc_patch_ght.c
* Remove unused vars in cu_pc_point.c
* Remove unused vars in cu_pc_bytes.c