tools/dfu.py: Make tool work with python3 when parsing DFU files.

dhylands · dpgeorge · commit cb99ca986282 · 2021-11-01T15:46:59.000+11:00
diff --git a/tools/dfu.py b/tools/dfu.py
@@ -20,7 +20,7 @@ def consume(fmt, data, names):
 
 
 def cstring(string):
-    return string.split("\0", 1)[0]
+    return string.split(b"\0", 1)[0]
 
 
 def compute_crc(data):
