[REF] qweb: improve generated code in some cases

tests/__snapshots__/animations.test.ts.snap

@@ -7,7 +7,6 @@ exports[`animations t-transition combined with component 1`] = `
     let QWeb = this.constructor;
     let parent = context;
     let owner = context;
-    let result;
     var h = this.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
@@ -42,7 +41,7 @@ exports[`animations t-transition combined with component 1`] = `
         def3 = def3.then(()=>{if (w4.__owl__.isDestroyed) {return};let pvnode=w4.__owl__.pvnode;c1[_2_index]=pvnode;});
     }
     extra.promises.push(def3);
-    return result;
+    return vn1;
 }"
 `;
 
@@ -53,7 +52,6 @@ exports[`animations t-transition combined with t-component and t-if 1`] = `
     let QWeb = this.constructor;
     let parent = context;
     let owner = context;
-    let result;
     var h = this.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('div', p1, c1);
@@ -90,7 +88,7 @@ exports[`animations t-transition combined with t-component and t-if 1`] = `
         }
         extra.promises.push(def3);
     }
-    return result;
+    return vn1;
 }"
 `;
 
@@ -98,7 +96,6 @@ exports[`animations t-transition with no delay/duration 1`] = `
 "function anonymous(context,extra
 ) {
     let utils = this.constructor.utils;
-    let result;
     var h = this.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('span', p1, c1);
@@ -112,7 +109,7 @@ exports[`animations t-transition with no delay/duration 1`] = `
       },
     };
     c1.push({text: \`blue\`});
-    return result;
+    return vn1;
 }"
 `;
 
@@ -120,7 +117,6 @@ exports[`animations t-transition, on a simple node (insert) 1`] = `
 "function anonymous(context,extra
 ) {
     let utils = this.constructor.utils;
-    let result;
     var h = this.h;
     let c1 = [], p1 = {key:1};
     var vn1 = h('span', p1, c1);
@@ -134,6 +130,6 @@ exports[`animations t-transition, on a simple node (insert) 1`] = `
       },
     };
     c1.push({text: \`blue\`});
-    return result;
+    return vn1;
 }"
 `;