Fix -r option argument order dependency

Move state.optind assignment from inside case 'r' to after the
getopt loop completes. This ensures optind points to the first
positional argument regardless of option order.

Before: -r file.amb -w output.wav would fail with "could not open -w"
After: argument order no longer matters for -r with other options

src/dsd_main.c

@@ -3088,7 +3088,6 @@
            opts.dmr_stereo = 0;
            state.dmr_stereo = 0;
            sprintf (opts.output_name, "MBE Playback");
-           state.optind = optind;
            break;
          case 'l':
            opts.use_cosine_filter = 0;
@@ -3098,6 +3097,10 @@
            exit (0);
          }
      }
+
+     // Set optind after getopt completes so -r works regardless of argument order
+     if (opts.playfiles == 1)
+       state.optind = optind;
  
      if (opts.resume > 0)
      {