avcodec/ra144dec: Fix runtime error: left shift of negative value -17

Fixes: 1830/clusterfuzz-testcase-minimized-5828293733384192

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/ra144dec.c

@@ -113,7 +113,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *data,
         do_output_subblock(ractx, block_coefs[i], refl_rms[i], &gb);
 
         for (j=0; j < BLOCKSIZE; j++)
-            *samples++ = av_clip_int16(ractx->curr_sblock[j + 10] << 2);
+            *samples++ = av_clip_int16(ractx->curr_sblock[j + 10] * (1 << 2));
     }
 
     ractx->old_energy = energy;