Sogs decompress fix (#7786)

Author: slimbuck

src/scene/gsplat/gsplat-sogs-data.js

@@ -234,11 +234,12 @@ class GSplatSogsData {
         quats._levels[0] = await readImageDataAsync(quats);
         scales._levels[0] = await readImageDataAsync(scales);
         sh0._levels[0] = await readImageDataAsync(sh0);
-        sh_labels._levels[0] = await readImageDataAsync(sh_labels);
-        sh_centroids._levels[0] = await readImageDataAsync(sh_centroids);
 
         // allocate spherical harmonics data
         if (shBands > 0) {
+            sh_labels._levels[0] = await readImageDataAsync(sh_labels);
+            sh_centroids._levels[0] = await readImageDataAsync(sh_centroids);
+
             const shMembers = [];
             for (let i = 0; i < 45; ++i) {
                 shMembers.push(`f_rest_${i}`);