avcodec/mjpegdec: fix typo on a warning

libavcodec/mjpegdec.c

@@ -282,7 +282,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
     }
 
     if (s->avctx->bits_per_raw_sample != bits) {
-        av_log(s->avctx, AV_LOG_INFO, "Changeing bps to %d\n", bits);
+        av_log(s->avctx, AV_LOG_INFO, "Changing bps to %d\n", bits);
         s->avctx->bits_per_raw_sample = bits;
         init_idct(s->avctx);
     }