More robust writing, even for bad files. Remove accidentally added imports

gerber/primitives.py

@@ -18,8 +18,6 @@ import math
 from operator import add, sub
 
 from .utils import validate_coordinates, inch, metric, rotate_point, nearly_equal
-from jsonpickle.util import PRIMITIVES
-from __builtin__ import False
 
 
 class Primitive(object):

gerber/render/rs274x_backend.py

@@ -384,6 +384,9 @@ class Rs274xContext(GerberContext):
             self.header.append(aperdef)
             
             # Store the dcode and the original so we can check if it really is the same
+            # If it didn't have a postition, set it to 0, 0
+            if amgroup.position == None:
+                amgroup.position = (0, 0)
             macro = (aperdef, amgroup)
             
             if macroinfo: