[FIX] t-call-context: fix capture making component available in ctx

Previously, when using a component with a slot within a t-call with
t-call-context, the component would become available again inside the
slot despite the t-call-context. This was caused by the fact that the
capture helper function creates an object with the component as its
prototype which is incorrect. It should just use the previous context as
its prototype.

src/compiler/code_generator.ts

@@ -1140,7 +1140,7 @@ export class CodeGenerator {
       if (this.target.loopLevel || !this.hasSafeContext) {
         ctxStr = generateId("ctx");
         this.helpers.add("capture");
-        this.define(ctxStr, `capture(ctx, this)`);
+        this.define(ctxStr, `capture(ctx)`);
       }
       let slotStr: string[] = [];
       for (let slotName in ast.slots) {
@@ -1316,7 +1316,7 @@ export class CodeGenerator {
     if (this.target.loopLevel || !this.hasSafeContext) {
       ctxStr = generateId("ctx");
       this.helpers.add("capture");
-      this.define(ctxStr, `capture(ctx, this)`);
+      this.define(ctxStr, `capture(ctx)`);
     }
     let id = generateId("comp");
     this.staticDefs.push({

src/runtime/template_helpers.ts

@@ -46,8 +46,8 @@ function callSlot(
   return slotBDom || text("");
 }
 
-function capture(ctx: any, component: any): any {
-  const result = ObjectCreate(component);
+function capture(ctx: any): any {
+  const result = ObjectCreate(ctx);
   for (let k in ctx) {
     result[k] = ctx[k];
   }
@@ -114,7 +114,7 @@ class LazyValue {
 
   constructor(fn: any, ctx: any, component: any, node: any, key: any) {
     this.fn = fn;
-    this.ctx = capture(ctx, component);
+    this.ctx = capture(ctx);
     this.component = component;
     this.node = node;
     this.key = key;