fixed wxStreamBuffer::SetBufferIO() (thanks to Gilles Depeyrot)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9058 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/stream.cpp

@@ -165,7 +165,7 @@ void wxStreamBuffer::SetBufferIO(void *start,
     m_buffer_size = len;
 
     // if we own it, we free it
-    m_destroybuf = !takeOwnership;
+    m_destroybuf = takeOwnership;
 
     ResetBuffer();
 }