avcodec/atrac1: Check allocation of AVFloatDSPContext

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

libavcodec/atrac1.c

@@ -362,6 +362,10 @@ static av_cold int atrac1_decode_init(AVCodecContext *avctx)
     ff_atrac_generate_tables();
 
     q->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
+    if (!q->fdsp) {
+        atrac1_decode_end(avctx);
+        return AVERROR(ENOMEM);
+    }
 
     q->bands[0] = q->low;
     q->bands[1] = q->mid;