VOXELFORMAT: VOX: disable assert about the reserved id in nTRN chunks

it looks like the voxedit.io (sandbox) editor is exporting invalid nTRN chunks and vengi errors out when this assert is triggered

src/modules/voxelformat/external/ogt_vox.h

@@ -1389,7 +1389,7 @@
                     _vox_file_read_uint32(fp, &reserved_id);
                     _vox_file_read_uint32(fp, &layer_id);
                     _vox_file_read_uint32(fp, &num_frames);
-                    ogt_assert(reserved_id == UINT32_MAX, "unexpected values for reserved_id in nTRN chunk");
+                    //ogt_assert(reserved_id == UINT32_MAX, "unexpected values for reserved_id in nTRN chunk");
                     ogt_assert(num_frames > 0, "must have at least 1 frame in nTRN chunk");
 
                     // make space in misc_data array for the number of transforms we'll need for this node