Move index assignment using POSITIONS

Author: tekktrik

adafruit_ht16k33/segments.py

@@ -350,11 +350,11 @@ def _put(self, char: str, index: int = 0):
         # pylint: disable=too-many-return-statements
         if not 0 <= index <= 3:
             return
+        index = self.POSITIONS[index]
         if self._chardict and char in self._chardict:
             self._set_buffer(index, self._chardict[char])
             return
         char = char.lower()
-        index = self.POSITIONS[index]
         if char == ".":
             self._set_buffer(index, self._get_buffer(index) | 0b10000000)
             return