fix corrupted presets error (#715)

lib/elements/fill.py

@@ -122,7 +122,7 @@ class Fill(EmbroideryElement):
     @cache
     def paths(self):
         paths = self.flatten(self.parse_path())
-        #ensure path length
+        # ensure path length
         for i, path in enumerate(paths):
             if len(path) < 3:
                 paths[i] = [(path[0][0], path[0][1]), (path[0][0]+1.0, path[0][1]), (path[0][0], path[0][1]+1.0)]

lib/gui/presets.py

@@ -98,7 +98,7 @@ class PresetsPanel(wx.Panel):
             with open(self.presets_path(), 'r') as presets:
                 presets = json.load(presets)
                 return presets
-        except IOError:
+        except (IOError, ValueError):
             return {}
 
     def _save_presets(self, presets):

lib/svg/tags.py

@@ -41,10 +41,10 @@ SVG_OBJECT_TAGS = (SVG_ELLIPSE_TAG, SVG_CIRCLE_TAG, SVG_RECT_TAG)
 INKSTITCH_ATTRIBS = {}
 inkstitch_attribs = [
                 'ties',
-                'trim_after',
-                'stop_after',
                 # clone
                 'clone',
+                # polyline
+                'polyline',
                 # fill
                 'angle',
                 'auto_fill',
@@ -86,8 +86,8 @@ inkstitch_attribs = [
                 'pull_compensation_mm',
                 'stroke_first',
                 # Legacy
-                'embroider_trim_after',
+                'trim_after',
-                'embroider_stop_after'
+                'stop_after'
                 ]
 for attrib in inkstitch_attribs:
     INKSTITCH_ATTRIBS[attrib] = inkex.addNS(attrib, 'inkstitch')