Record IO C++ binding: buffer type not handled correctly

I added this code to the test, which currently only tests serialization/deserialization of an empty buffer.

std::string& b = r1.getBufferVal();
static char buffer[] =

{0, 1, 2, 3, 4, 5}

;
for (int i = 0; i < 6; i++)

{ b.push_back(buffer[i]); }

The csv test fails. The generated file looks like this.
T,102,4567,99344109427290,3.145000,1.523400,',# 0 1 2 3 4 5 0 1 2 3 4 5,v{},m{}

The xml test passes, but the data in the xml file is wrong:

<value><string>000102030405000102030405000102030405</string></value>