[shaders] Allow alpha for shader colors.

Change-Id: Ie05267757a406c89820cb6e0d401d3eb5a418dab
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/373036
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
diff --git a/shaders/modules/shaders-app-sk/shaders-app-sk.ts b/shaders/modules/shaders-app-sk/shaders-app-sk.ts
index 8ab2d08..dcadbc9 100644
--- a/shaders/modules/shaders-app-sk/shaders-app-sk.ts
+++ b/shaders/modules/shaders-app-sk/shaders-app-sk.ts
@@ -100,7 +100,7 @@
   const obj: any = {};
   str.split(/\s+/).forEach((word) => {
     if (!word) {
-      return
+      return;
     }
     obj[word] = true;
   });
@@ -603,7 +603,7 @@
     const uniformsFloat32Array: Float32Array = this.uniformsMallocObj.toTypedArray() as Float32Array;
     uniformsArray.forEach((val, index) => { uniformsFloat32Array[index] = val; });
 
-    const shader = this.effect!.makeShaderWithChildren(uniformsFloat32Array, true, this.inputImageShaders);
+    const shader = this.effect!.makeShaderWithChildren(uniformsFloat32Array, false, this.inputImageShaders);
     this._render();
 
     // Allow uniform controls to update, such as uniform-timer-sk.