PVS-Studio warning V512 for Wolf

typedef struct cvar_s {
  char        *name;
  ...
  struct cvar_s *hashNext;
} cvar_t;

void Cvar_Restart_f( void ) {
  cvar_t  *var;
  ...
  memset( var, 0, sizeof( var ) );
  ...
}

This is what should have been written here:
memset( var, 0, sizeof( *var ) );

This suspicious code was found in Wolf 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. wolf cvar.c 764

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/