fix a bug in dot_product. The return was done before _mm_empty()

openair1/PHY/TOOLS/cdot_prod.c

@@ -115,11 +115,11 @@ int32_t dot_product(int16_t *x,
   // convert back to integer
   result = _mm_cvtsi64_si32(mmtmp7);
 
-  return(result);
-
   _mm_empty();
   _m_empty();
 
+  return(result);
+
 #elif defined(__arm__)
   int16x4_t *x_128=(int16x4_t*)x;
   int16x4_t *y_128=(int16x4_t*)y;