cmdutils: remove list_fmts(), simplify

The function was only used in opt_sample_fmt() for listing the sample
formats. Move list_fmts() functionality directly into
opt_sample_fmt().

Als fix the warning:
ffmpeg.c: In function ‘opt_audio_sample_fmt’:
ffmpeg.c:2877: warning: passing argument 1 of ‘list_fmts’ from incompatible pointer type
cmdutils.h:163: note: expected ‘void (*)(char *, int,  int)’ but argument is of type ‘char * (*)(char *, int,  enum AVSampleFormat)’

1 files changed, 4 insertions, 1 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index 6f74e61e18..a8d0dcf647 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -2850,7 +2850,10 @@ static void opt_audio_sample_fmt(const char *arg)
             ffmpeg_exit(1);
         }
     } else {
-        list_fmts(av_get_sample_fmt_string, AV_SAMPLE_FMT_NB);
+        int i;
+        char fmt_str[128];
+        for (i = -1; i < AV_SAMPLE_FMT_NB; i++)
+            printf("%s\n", av_get_sample_fmt_string(fmt_str, sizeof(fmt_str), i));
         ffmpeg_exit(0);
     }
 }