From be4f9efc176d60e00de0ec1245a40b88567ebc4c Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Thu, 23 Oct 2008 23:51:30 +0000
Subject: [PATCH] don't yell if file is not open

---
 dtool/src/dtoolutil/pandaFileStreamBuf.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dtool/src/dtoolutil/pandaFileStreamBuf.cxx b/dtool/src/dtoolutil/pandaFileStreamBuf.cxx
index 8bbdf79811..f192dac77a 100644
--- a/dtool/src/dtoolutil/pandaFileStreamBuf.cxx
+++ b/dtool/src/dtoolutil/pandaFileStreamBuf.cxx
@@ -448,7 +448,7 @@ underflow() {
 ////////////////////////////////////////////////////////////////////
 size_t PandaFileStreamBuf::
 read_chars(char *start, size_t length) {
-  if (length == 0) {
+  if (length == 0 || !_is_open) {
     // Trivial no-op.
     return 0;
   }
@@ -641,7 +641,7 @@ read_chars_raw(char *start, size_t length) {
 ////////////////////////////////////////////////////////////////////
 size_t PandaFileStreamBuf::
 write_chars_raw(const char *start, size_t length) {
-  if (length == 0) {
+  if (length == 0 || !_is_open) {
     return 0;
   }