Correct index value calculation from pot input

Fix reading of pot input to correctly determine index value.

Author: CedarGroveStudios

examples/rangeslicer_rotary_switch_example.py

@@ -52,7 +52,7 @@
 
 while True:
     new_index = int(
-        pot.range_slicer(pot_input.value)
+        pot.range_slicer(pot_input.value)[0]
     )  # read pot and determine the index value
 
     if new_index != old_index:  # compare old and new; did the index value change?