Revert change of Message extended id default behaviour.

Author: hardbyte

CHANGELOG.txt

@@ -8,7 +8,6 @@ Last call for Python2 support.
 * #879 Updating incorrect api documentation.
 * #885 Fix recursion message in Message.__getattr__
 * #845 Fix socketcan issue
-* #788 Fix issue with extended_id
 
 
 Version 3.3.3

can/__init__.py

@@ -8,7 +8,7 @@
 
 import logging
 
-__version__ = "3.3.4-alpha0"
+__version__ = "3.3.4-alpha1"
 
 log = logging.getLogger('can')
 

can/message.py

@@ -112,7 +112,8 @@ def __init__(self, timestamp=0.0, arbitration_id=0, is_extended_id=None,
         if is_extended_id is not None:
             self.is_extended_id = is_extended_id
         else:
-            self.is_extended_id = False if extended_id is None else extended_id
+            # Default behaviour is to create extended id messages
+            self.is_extended_id = True if extended_id is None else extended_id
 
         self.is_remote_frame = is_remote_frame
         self.is_error_frame = is_error_frame