Fix BIO_f_buffer().

Submitted by: Adam Langley
Reviewed by: Bodo Moeller
diff --git a/CHANGES b/CHANGES
index 142dc80..753492b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -490,6 +490,10 @@
 
  Changes between 1.0.0e and 1.0.0f [xx XXX xxxx]
 
+  *) Fix the BIO_f_buffer() implementation (which was mixing different
+     interpretations of the '..._len' fields).
+     [Adam Langley (Google)]
+
   *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
      BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
      threads won't reuse the same blinding coefficients.
@@ -1410,6 +1414,10 @@
   
  Changes between 0.9.8r and 0.9.8s [xx XXX xxxx]
 
+  *) Fix the BIO_f_buffer() implementation (which was mixing different
+     interpretations of the '..._len' fields).
+     [Adam Langley (Google)]
+
   *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
      BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
      threads won't reuse the same blinding coefficients.