Fix Makefile for haptic

src/Makefile

@@ -293,6 +293,7 @@ ifeq ($(PCB), V4)
   EEPROMSRC = eeprom_avr.cpp
   PULSESSRC = pulses_avr.cpp  
   CPPSRC += audio.cpp
+  CPPSRC += haptic.cpp
   CPPSRC += gruvin9x/gtime.cpp
   CPPSRC += gruvin9x/rtc.cpp
   CPPSRC += gruvin9x/ff.cpp
@@ -334,6 +335,12 @@ ifeq ($(PCB), STD)
   else
     CPPSRC += beeper.cpp 
   endif
+  
+  ifeq ($(HAPTIC), YES)
+   CPPDEFS += -DHAPTIC
+   CPPSRC += haptic.cpp
+  endif
+  
 endif
 
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