backport to blender 2.76

Author: spoonless

__init__.py

@@ -26,8 +26,8 @@
 bl_info = {
     "name": "Rigacar (Generates Car Rig)",
     "author": "David Gayerie",
-    "version": (3, 0),
-    "blender": (2, 79, 0),
+    "version": (3, 1),
+    "blender": (2, 76, 0),
     "location": "View3D > Add > Armature",
     "description": "Adds a deformation rig for vehicules, generates animation rig and bake wheels animation.",
     "wiki_url": "http://digicreatures.net/articles/rigacar.html",

bake_operators.py

@@ -125,7 +125,7 @@ def _create_scale_evaluator(self, action, source_bone):
 
     def _bake_action(self, context, *source_bones):
         action = context.object.animation_data.action
-        nla_tweak_mode = context.object.animation_data.use_tweak_mode
+        nla_tweak_mode = context.object.animation_data.use_tweak_mode if hasattr(context.object.animation_data, 'use_tweak_mode') else False
 
         # saving context
         selected_bones = [b for b in context.object.data.bones if b.select]