Invalidate layout when node is removed from tree

Summary: The layout of a node is invalid once it leaves the tree. Let's reset it for safety in case it is added to another tree.

Reviewed By: astreet

Differential Revision: D4716022

fbshipit-source-id: 399cc64a4b3f5fd3fc469ea37bdd31abe474dc6c

yoga/Yoga.c

@@ -423,6 +423,7 @@ void YGNodeInsertChild(const YGNodeRef node, const YGNodeRef child, const uint32
 
 void YGNodeRemoveChild(const YGNodeRef node, const YGNodeRef child) {
   if (YGNodeListDelete(node->children, child) != NULL) {
+    child->layout = gYGNodeDefaults.layout; // layout is no longer valid
     child->parent = NULL;
     YGNodeMarkDirtyInternal(node);
   }