Fix UBSan errors (left shift of negative value)

webrtc/modules/audio_coding/codecs/isac/fix/source/lattice.c

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 256 matching lines @@
     sh = WebRtcSpl_NormW32(tmp32); // tmp32 is the gain
     den16 = (int16_t) WEBRTC_SPL_SHIFT_W32(tmp32, sh-16); //Q(27+sh-16) = Q(sh+11) (all 16 bits are value bits)
     inv_gain32 = WebRtcSpl_DivW32W16((int32_t)2147483647, den16); // 1/gain in Q31/Q(sh+11) = Q(20-sh)
 
     //initial conditions
     inv_gain16 = (int16_t)(inv_gain32 >> 2);  // 1/gain in Q(20-sh-2) = Q(18-sh)
 
     for (i=0;i<HALF_SUBFRAMELEN;i++)
     {
 
-      tmp32 = lat_inQ25[i + temp1] << 1;  // Q25->Q26
+      tmp32 = lat_inQ25[i + temp1] * (1 << 1);  // Q25->Q26
       tmp32 = WEBRTC_SPL_MUL_16_32_RSFT16(inv_gain16, tmp32); //lat_in[]*inv_gain in (Q(18-sh)*Q26)>>16 = Q(28-sh)
       tmp32 = WEBRTC_SPL_SHIFT_W32(tmp32, -(28-sh)); // lat_in[]*inv_gain in Q0
 
       ARfQ0vec[i] = (int16_t)WebRtcSpl_SatW32ToW16(tmp32); // Q0
     }
 
     // Get the state of f & g for the first input, for all orders.
     for (i = orderCoef; i > 0; i--)
     {
       tmp32 = (cthQ15[i - 1] * ARfQ0vec[0] - sthQ15[i - 1] * stateGQ0[i - 1] +
@@ skipping 19 matching lines @@
     /* cannot use memcpy in the following */
 
     for (i=0;i<ord_1;i++)
     {
       stateGQ0[i] = ARgQ0vec[i];
     }
   }
 
   return;
 }