message: fix Coroutine::getUid crash.
diff: @@ -345,6 +345,7 @@ sw_inline void coro_close(TSRMLS_D)
  EG(vm_stack_top) = COROG.origin_vm_stack_top;
  EG(vm_stack_end) = COROG.origin_vm_stack_end;
  --COROG.coro_num;
  + COROG.current_coro = NULL;
  swTrace("closing coro and %d remained. usage size: %zu. malloc size: %zu", COROG.coro_num, zend_memory_usage(0), zend_memory_usage(1));
  }
  #endif
  