Fix index out of range error when using dfu switch and dfu flashing

tools/odrive/__init__.py

@@ -53,4 +53,4 @@ def find_any(path=default_search_path, serial_number=None,
         channel_termination_token.set()
         raise
 
-    return result[0]
+    return result[0] if len(result) > 0 else None

tools/setup.py

@@ -32,14 +32,14 @@ to publish packages with the name odrive.
 """
 
 # Set to true to make the current release
-is_release = True
+is_release = False
 
 # Set to true to make an official post-release, rather than dev of new version
 is_post_release = False
 post_rel_num = 0
 
 # To test higher numbered releases, bump to the next rev
-devnum = 0
+devnum = 6
 bump_rev = not is_post_release and not is_release
 
 # TODO: add additional y/n prompt to prevent from erroneous upload
@@ -67,8 +67,9 @@ version = odrive.version.get_version_str(
 if creating_package:
   if is_post_release:
     version += str(post_rel_num)
-  elif (devnum > 0):
-    version += str(devnum)
+  #elif (devnum > 0):
+  #  version += str(devnum)
+  version+= str(devnum)
 
   version_file_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'odrive', 'version.txt')
   with open(version_file_path, mode='w') as version_file: