code clean up - remove extra parentheses (#293)

[ROCm/rocdecode commit: f94422f722]

projects/rocdecode/src/rocdecode/vaapi/vaapi_videodecoder.cpp

@@ -81,7 +81,7 @@ rocDecStatus VaapiVideoDecoder::InitializeDecoder(std::string gcn_arch_name) {
     GetVisibleDevices(visible_devices);
     std::string drm_node;
     if (visible_devices.size() != 0) {
-        drm_node = "/dev/dri/renderD" + std::to_string(128 + (visible_devices[decoder_create_info_.device_id]) * num_render_cards_per_device);
+        drm_node = "/dev/dri/renderD" + std::to_string(128 + visible_devices[decoder_create_info_.device_id] * num_render_cards_per_device);
     } else {
         drm_node = "/dev/dri/renderD" + std::to_string(128 + decoder_create_info_.device_id * num_render_cards_per_device);
     }