Assume 7 words for the DPI list response

HID++ 2.0 responses are 20 bytes, once you strip the 4 byte common
header and 1 byte sensorIdx, you have 15 bytes left. Since DPI values
are 16-bit words, only 14 bytes should be used.

lib/logitech_receiver/settings_templates.py

@@ -172,7 +172,7 @@ def _feature_adjustable_dpi_choices(device):
 	assert reply, 'Oops, DPI list cannot be retrieved!'
 	dpi_list = []
 	step = None
-	for val in _unpack('!B7H', reply)[1:]:
+	for val in _unpack('!7H', reply[1:1+14]):
 		if val == 0:
 			break
 		if val >> 13 == 0b111: