Make the hit accessible from the drawable Hit, fix crash with cario drawing rect

gerber/excellon.py

@@ -126,7 +126,7 @@ class ExcellonFile(CamFile):
 
     @property
     def primitives(self):
-        return [Drill(hit.position, hit.tool.diameter,units=self.settings.units) for hit in self.hits]
+        return [Drill(hit.position, hit.tool.diameter, hit, units=self.settings.units) for hit in self.hits]
 
 
     @property

gerber/primitives.py

@@ -741,11 +741,12 @@ class SquareRoundDonut(Primitive):
 class Drill(Primitive):
     """ A drill hole
     """
-    def __init__(self, position, diameter, **kwargs):
+    def __init__(self, position, diameter, hit, **kwargs):
         super(Drill, self).__init__('dark', **kwargs)
         validate_coordinates(position)
         self.position = position
         self.diameter = diameter
+	self.hit = hit
         self._to_convert = ['position', 'diameter']
 
     @property

gerber/render/cairo_backend.py

@@ -124,7 +124,7 @@ class GerberCairoContext(GerberContext):
         self.ctx.set_source_rgba(color[0], color[1], color[2], self.alpha)
         self.ctx.set_operator(cairo.OPERATOR_OVER if (rectangle.level_polarity == "dark" and not self.invert) else cairo.OPERATOR_CLEAR)        
         self.ctx.set_line_width(0)
-        self.ctx.rectangle(*ll,width=width, height=height)
+        self.ctx.rectangle(ll[0], ll[1], width, height)
         self.ctx.fill()
 
     def _render_obround(self, obround, color):