Broken product page: null value in column's children at index 0

[stephanegigandet]

I was trying to replicate #266 using master, but instead I have a different issue...

[stephanegigandet]

And for me, I'm missing images not in the horizontal list view, but in the cards and lists... weird.

[stephanegigandet]

======== Exception caught by widgets library =======================================================
The following assertion was thrown building SmoothCard(dirty):
Column's children must not contain any null values, but a null value was found at index 0

When the exception was thrown, this was the stack:
#0 new MultiChildRenderObjectWidget. (package:flutter/src/widgets/framework.dart:1922:11)
#1 new MultiChildRenderObjectWidget (package:flutter/src/widgets/framework.dart:1929:6)
#2 new Flex (package:flutter/src/widgets/basic.dart:4136:8)
#3 new Column (package:flutter/src/widgets/basic.dart:4704:8)
#4 SmoothCard.build (package:smooth_ui_library/widgets/smooth_card.dart:26:20)