Move status codes into a separate header

init/init.c

@@ -22,7 +22,7 @@ int make_thread (void (*fn) (void)) {
   size_t stack_size = 256 * PAGE_SIZE;
   void* stack = malloc (stack_size);
   if (stack == NULL)
-    return -SR_OOM_ERROR;
+    return -ST_OOM_ERROR;
 
   uintptr_t stack_top = (uintptr_t)stack + stack_size;
   return proc_spawn_thread (stack_top, stack_size, (void*)fn);