applied 928163: zlib truncated output fix

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@26908 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/zstream.cpp

@@ -163,6 +163,9 @@ wxZlibOutputStream::~wxZlibOutputStream()
   }
 
   deflateEnd(m_deflate);
+
+  m_parent_o_stream->Write(m_z_buffer, m_z_size-m_deflate->avail_out);
+
   delete m_deflate;
 
   delete[] m_z_buffer;