fix crash on init caused by the previous change :)

fand.py

@@ -46,6 +46,9 @@ class PWM:
 		# disable channel
 		self.set_enabled(False)
 		
+		# acquire a duty cycle file descriptor
+		self.f_dc = open(self.ch_base + "duty_cycle", "w")
+		
 		# set 0 duty cycle so period can be freely set
 		self.set_duty_cycle(0)
 		
@@ -56,12 +59,6 @@ class PWM:
 		with open(self.ch_base + "polarity", "w") as f:
 			f.write("normal")
 		
-		# acquire a duty cycle file descriptor
-		self.f_dc = open(self.ch_base + "duty_cycle", "w")
-		
-		# set to idle
-		self.set_percent(0)
-		
 		# re-enable channel
 		self.set_enabled(True)