avcodec/truemotion2: Don't check before freeing VLC

ff_vlc_free() is of course compatible with freeing
a blank VLC.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/truemotion2.c

@@ -222,8 +222,7 @@ out:
 static void tm2_free_codes(TM2Codes *code)
 {
     av_free(code->recode);
-    if (code->vlc.table)
-        ff_vlc_free(&code->vlc);
+    ff_vlc_free(&code->vlc);
 }
 
 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)