avcodec/samidec: make sure to properly restore parsing context after a tag

(cherry picked from commit 70082a1e)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

libavcodec/samidec.c

@@ -91,6 +91,7 @@ static int sami_paragraph_to_ass(AVCodecContext *avctx, const char *src)
                     break;
                 if (*p == '>')
                     p++;
+                continue;
             }
             if (!av_isspace(*p))
                 av_bprint_chars(dst, *p, 1);