Compilation should be ok now

PORTH_TIMING option now included in DEBUG=YES

src/open9x.cpp

@@ -2996,9 +2996,8 @@ uint16_t getTmr16KHz()
 #if defined (PCBGRUVIN9X)
 ISR(TIMER5_COMPA_vect, ISR_NOBLOCK) // mixer interrupt
 {
-
-#ifdef PORTH_TIMING
-    PORTH |= 0x40; // PORTH:6 LOW->HIGH signals start of mixer interrupt
+#if defined(DEBUG) && !defined(VOICE)
+  PORTH |= 0x40; // PORTH:6 LOW->HIGH signals start of mixer interrupt
 #endif
 
   cli();
@@ -3033,10 +3032,9 @@ ISR(TIMER5_COMPA_vect, ISR_NOBLOCK) // mixer interrupt
   TIMSK5 |= (1<<OCIE5A); //stop reentrance
   sei();
 
-#ifdef PORTH_TIMING
+#if defined(DEBUG) && !defined(VOICE)
   PORTH &= ~0x40; // PORTH:6 HIGH->LOW signals end of mixer interrupt
 #endif
-
 }
 #endif