PVS-Studio warning V547 for MAME

int m_led_extender;
#define CARD_A   1
#define NO_EXTENDER  0

static WRITE8_DEVICE_HANDLER( pia_ic5_porta_w )
{
  ...
  else if ((state->m_led_extender != CARD_A)||
           (state->m_led_extender != NO_EXTENDER))
  ...
}

This suspicious code was found in MAME project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression is always true. Probably the '&&' operator should be used here.  mpu4.c 934

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/