PVS-Studio warning V512 for Notepad++

#define CONT_MAP_MAX 50
int _iContMap[CONT_MAP_MAX];
...
DockingManager::DockingManager()
{
  ...
  memset(_iContMap, -1, CONT_MAP_MAX);
  ...
}

This is what should have been written here: memset(_iContMap, -1, CONT_MAP_MAX * sizeof(int));

This suspicious code was found in Notepad++ project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the memset function will lead to a buffer overflow or underflow

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/