2011-03-13 Ivan Maidanski <ivmai@mail.ru>

2011-03-13  Ivan Maidanski  <ivmai@mail.ru>

	* dbg_mlc.c (GC_make_closure): Fix SEGV in case GC_malloc returns
	NULL.
	* dbg_mlc.c (GC_debug_register_finalizer,
	GC_debug_register_finalizer_no_order,
	GC_debug_register_finalizer_unreachable,
	GC_debug_register_finalizer_ignore_self): Handle out of memory
	case properly (similar to GC_register_finalizer_inner).
	* headers.c (GC_install_header): Handle the case when alloc_hdr()
	returns NULL.
	* os_dep.c (GC_get_maps_len): Defend against missing "maps" file.
	* pthread_support.c (GC_mark_thread): Place a dummy return
	statement (which uses "id" argument) before the actual use of "id"
	as an array index (to suppress a warning produced by some static
	code analysis tools).
	* win32_threads.c (GC_mark_thread): Ditto.
	* pthread_support.c (GC_thr_init): Abort (with the appropriate
	message) if out of memory.