libiberty: stop using PTR macro

include/ChangeLog:

	* hashtab.h (HTAB_EMPTY_ENTRY): Use void * instead PTR.
	(HTAB_DELETED_ENTRY): Likewise.

libiberty/ChangeLog:

	* alloca.c (C_alloca): Use void * instead PTR.
	* calloc.c (malloc): Likewise.
	(bzero): Likewise.
	(calloc): Likewise.
	* hashtab.c (find_empty_slot_for_expand): Likewise.
	(eq_pointer): Likewise.
	(htab_create_alloc_ex): Likewise.
	(htab_create_typed_alloc): Likewise.
	(htab_set_functions_ex): Likewise.
	(htab_delete): Likewise.
	(htab_empty): Likewise.
	(htab_expand): Likewise.
	(htab_find_with_hash): Likewise.
	(htab_find): Likewise.
	(htab_find_slot_with_hash): Likewise.
	(htab_find_slot): Likewise.
	(htab_remove_elt): Likewise.
	(htab_remove_elt_with_hash): Likewise.
	(htab_clear_slot): Likewise.
	(htab_traverse_noresize): Likewise.
	(htab_traverse): Likewise.
	(htab_hash_string): Likewise.
	(iterative_hash): Likewise.
	(hash_pointer): Likewise.
	* memchr.c (memchr): Likewise.
	* memcmp.c (memcmp): Likewise.
	* memcpy.c (memcpy): Likewise.
	* memmove.c (memmove): Likewise.
	* mempcpy.c (memcpy): Likewise.
	(mempcpy): Likewise.
	* memset.c (memset): Likewise.
	* objalloc.c (malloc): Likewise.
	(free): Likewise.
	(objalloc_create): Likewise.
	(_objalloc_alloc): Likewise.
	(objalloc_free_block): Likewise.
	* random.c (PTR): Likewise.
	(void): Likewise.
	(initstate): Likewise.
	(setstate): Likewise.
	* regex.c: Likewise.
	* spaces.c (malloc): Likewise.
	(free): Likewise.
	* stpcpy.c (memcpy): Likewise.
	* strdup.c (malloc): Likewise.
	(memcpy): Likewise.
	* strerror.c (malloc): Likewise.
	(memset): Likewise.
	* strndup.c (malloc): Likewise.
	(memcpy): Likewise.
	* strsignal.c (malloc): Likewise.
	(memset): Likewise.
	* vasprintf.c (malloc): Likewise.
	* vprintf-support.c: Likewise.
	* xatexit.c (malloc): Likewise.
	* xmalloc.c (xmalloc): Likewise.
	(xcalloc): Likewise.
	(xrealloc): Likewise.
	* xmemdup.c (xmemdup): Likewise.