[FIX] qweb: improve generated compiled code

src/component/component.ts

@@ -549,7 +549,6 @@ export class Component<T extends Env, Props extends {}> {
 
   __getTemplate(qweb: QWeb): string {
     let p = (<any>this).constructor;
-    // console.warn(p, p.template, p._template, 'template' in p, p.hasOwnProperty('template'))
     if (!p.hasOwnProperty("_template")) {
       if (p.template) {
         p._template = p.template;

src/qweb/base_directives.ts

@@ -55,7 +55,9 @@ function compileValueNode(value: any, node: Element, qweb: QWeb, ctx: Context) {
       ctx.rootContext.rootNode = nodeID;
       ctx.rootContext.parentTextNode = nodeID;
       ctx.addLine(`var vn${nodeID} = {text: ${exprID}};`);
-      ctx.addLine(`result = vn${nodeID}`);
+      if (ctx.rootContext.shouldDefineResult) {
+        ctx.addLine(`result = vn${nodeID}`);
+      }
     }
   } else {
     let fragID = ctx.generateID();

src/qweb/context.ts

@@ -98,7 +98,7 @@ export class Context {
     if (!this.rootContext.rootNode) {
       this.rootContext.rootNode = node;
     }
-    if (!this.parentNode) {
+    if (!this.parentNode && this.rootContext.shouldDefineResult) {
       this.addLine(`result = vn${node};`);
     }
     return this.subContext("parentNode", node);