fix `--realesrgan-models-path` not working

from modules.upscaler import Upscaler, UpscalerData

from modules.shared import cmd_opts, opts

from modules import modelloader

class UpscalerRealESRGAN(Upscaler):

    def __init__(self, path):

            self.enable = True

            self.scalers = []

            scalers = self.load_models(path)

            local_model_paths = self.find_models(ext_filter=[".pth"])

            for scaler in scalers:

                if scaler.local_data_path.startswith("http"):

                    filename = modelloader.friendly_name(scaler.local_data_path)

                    local = next(iter([local_model for local_model in local_model_paths if local_model.endswith(filename + '.pth')]), None)

                    if local:

                        scaler.local_data_path = local

                if scaler.name in opts.realesrgan_enabled_models:

                    self.scalers.append(scaler)

                print(f"Unable to find model info: {path}")

                return None

            if info.local_data_path.startswith("http"):

                info.local_data_path = load_file_from_url(url=info.data_path, model_dir=self.model_path, progress=True)

            return info

        except Exception as e:

            print(f"Error making Real-ESRGAN models list: {e}", file=sys.stderr)