shithub: sox

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fix no comment for output file

--- a/src/sox.c

+++ b/src/sox.c

@@ -2150,7 +2150,7 @@

       case 4:

         sox_append_comment(&f->oob.comments, "");

-        if (optarg)

+        if (*optarg)

           sox_append_comment(&f->oob.comments, optarg);

         break;