PVS-Studio warning V557 for iecsdk

#define PL_MAX_PATH 255
#define PL2GANFLIA_COUNTER_MAX_LENGTH PL_MAX_PATH

char name[PL_MAX_PATH];

int main(int argc, char *argv[]) {
  ...
  p->pl_counters_data[i].name[
    PL2GANFLIA_COUNTER_MAX_LENGTH
  ] = '\0';
  ...
}

This is what should have been written here: PL2GANFLIA_COUNTER_MAX_LENGTH - 1


This suspicious code was found in iecsdk project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The '255' index is pointing beyond array bound. pl2ganglia pl2ganglia.c 1114

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/