Fix #1091 set correct select value when options change

Always consider the edge case of setting a <select> value when building an object. When a <select> node is reused, its option children can change, so its value attribute has to be re-assigned after its children have been recreated/updated.

mithril.js

@@ -727,13 +727,6 @@
 			cached.children.nodes = []
 		}
 
-		// edge case: setting value on <select> doesn't work before children
-		// exist, so set it again after children have been created
-		if (data.tag === "select" && "value" in data.attrs) {
-			setAttributes(node, data.tag, {value: data.attrs.value}, {},
-				namespace)
-		}
-
 		return cached
 	}
 
@@ -888,6 +881,13 @@
 				controllers)
 		}
 
+		// edge case: setting value on <select> doesn't work before children
+		// exist, so set it again after children have been created/updated
+		if (data.tag === "select" && "value" in data.attrs) {
+			setAttributes(node, data.tag, {value: data.attrs.value}, {},
+				namespace)
+		}
+
 		if (!isNew && shouldReattach === true && node != null) {
 			insertNode(parentElement, node, index)
 		}