PVS-Studio warning V512 for samba

void initialize(PERF_DATA_BLOCK *data,
  RuntimeSettings *rt, int argc, char **argv)
{
    memset(data, 0, sizeof(*data));
    memset(rt, 0, sizeof(*data));
  ....
}

Most likely this is what should be written here: memset(rt, 0, sizeof(*rt));.

This suspicious code was found in samba project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer 'rt'. perf_writer.c 80

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/