lua now can run "life.lua" test without running out-of-memory. Now

Lua can properly use all the system memory available.

Author: rafael2k

src/mem.c

@@ -30,8 +30,16 @@ void *malloc(size_t size)
     }
 
     if (size <= malloc_arena_thresh)
+	{
         p = _fmalloc(size);
-    else p = fmemalloc(size);
+		if (p == NULL)
+		{
+            __dprintf("HEAP full: allocating from far memory %u\n", size);
+			p = fmemalloc(size);
+		}
+	}
+    else
+		p = fmemalloc(size);
     return p;
 }