Print error message when output buffer allocation fails

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@19194 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

ffmpeg.c

@@ -1930,6 +1930,8 @@ static int av_encode(AVFormatContext **output_files,
     if (!bit_buffer)
         bit_buffer = av_malloc(bit_buffer_size);
     if (!bit_buffer) {
+        fprintf(stderr, "Cannot allocate %d bytes output buffer\n",
+                bit_buffer_size);
         ret = AVERROR(ENOMEM);
         goto fail;
     }