Ensure affinity is not discarded from a view column if the view appears on the rhs of a LEFT JOIN. Fix for [45f4bf4e].

FossilOrigin-Name: ac31edd3eeafcef46164a4506bbc32c711bb7cd78378aeaa4c9bb12524ac5ea1

src/select.c

@@ -3498,6 +3498,7 @@ static Expr *substExpr(
           ifNullRow.op = TK_IF_NULL_ROW;
           ifNullRow.pLeft = pCopy;
           ifNullRow.iTable = pSubst->iNewTable;
+          ifNullRow.flags = EP_Skip;
           pCopy = &ifNullRow;
         }
         testcase( ExprHasProperty(pCopy, EP_Subquery) );