* mallocs.c (scm_malloc_obj): use scm_gc_malloc in stead of

* mallocs.c (scm_malloc_obj): use scm_gc_malloc in stead of
malloc.

* gc-segment.c (scm_i_get_new_heap_segment): remove cluster cruft:
only use SCM_MIN_HEAP_SEG_SIZE.

* ports.c (scm_add_to_port_table): add backwards compatibility
function

* ports.h: use scm_i_ prefix for port table and port table size.