PartDesign: Ignore errors due to object misconfiguration in previews

This adds ignoring catch to the updatePreview method of
ViewProviderTransformed so it does not report issues that happen because
recompute takes place on object that is not yet fully configured.

src/Mod/PartDesign/Gui/ViewProviderTransformed.cpp

@@ -129,6 +129,8 @@ void ViewProviderTransformed::updatePreview()
                 pcPreviewRoot->addChild(sep);
             }
         }
+    } catch (const Base::ValueError&) {
+        // no-op - ignore misconfigured objects
     } catch (const Base::Exception& e) {
         e.reportException();
     }