* libbfd.c (bfd_malloc, bfd_realloc): New functions.

	* libbfd.c (bfd_malloc, bfd_realloc): New functions.
	(bfd_zmalloc): Return PTR, not char *.  Take size_t, not
	bfd_size_type.
	* libbfd-in.h (bfd_malloc, bfd_realloc): Declare.
	(bfd_zmalloc): Change declaration.
	* libbfd.h: Rebuild.
	* Many files: Use bfd_malloc and bfd_realloc rather than malloc
	and realloc.  Don't set bfd_error_no_memory if they fail.