Prevent Bind Group Error with Zero Triangles (#531)

Thank you very much for this great sample! This quick fix allocates at
least one triangle’s space in the uniform buffer, avoiding the
“Uncaptured error: GPUDevice.createBindGroup: entrySize == 0 or
entrySize(24) + entryOffset(0) > buffer size(4) or
layoutBinding->minBindingSize(20) > entrySize(24)” when numTriangles is
0 on iPadOS 18.5 (with feature flag enabled). It is quite easy to set to
zero, so the error is easily triggered, and I guess users might want to
set it to zero (initially, I thought of setting the minimum to one;
however, this also provides some statistics, just in case). Thank you
very much in advance! If any changes would make this PR more suitable,
please let me know, and I can adjust.

Author: mehmetoguzderin

sample/animometer/main.ts

@@ -168,7 +168,9 @@ function configure() {
   const alignedUniformFloats =
     alignedUniformBytes / Float32Array.BYTES_PER_ELEMENT;
   const uniformBuffer = device.createBuffer({
-    size: numTriangles * alignedUniformBytes + Float32Array.BYTES_PER_ELEMENT,
+    size:
+      Math.max(numTriangles, 1) * alignedUniformBytes +
+      Float32Array.BYTES_PER_ELEMENT,
     usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.UNIFORM,
   });
   const uniformBufferData = new Float32Array(