* elfcode.h (elf_object_p): Add comment about what this function

	* elfcode.h (elf_object_p):  Add comment about what this function
	does and to watch out for side effects.  Add FIXME for memory leaks.
	Fix comment about checking for matching byte order.  Preserve
	pointer to old tdata (if any), and restore it if we don't match
	file with target vector.  If we are going to use goto's, use them
	consistently and maintainably.
	* nlmcode.h (nlm_object_p):  Expand comments about leaked memory
	to note that the problem is even more serious than just leaked
	memory.  Replace goto with more traditional return.