avcodec/hqx: fix typo

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/hqx.c

@@ -545,7 +545,7 @@ static int hqx_decode_frame(AVCodecContext *avctx, void *data,
     }
     ret = av_image_check_size(ctx->width, ctx->height, 0, avctx);
     if (ret < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid stored dimenstions %dx%d.\n",
+        av_log(avctx, AV_LOG_ERROR, "Invalid stored dimensions %dx%d.\n",
                ctx->width, ctx->height);
         return AVERROR_INVALIDDATA;
     }