Add default case for undefined pointer initialization

Bug: 28026175
Change-Id: I1b149bf1573296df18abbe44f737bd87ab3913f9

libSBRdec/src/env_extr.cpp

@@ -904,6 +904,9 @@ static const FRAME_INFO v_frame_info4_8 = { 0, 4, {0, 2, 4, 6, 8}, {1, 1, 1, 1},
             break;
         default:
             FDK_ASSERT(0);
+            /* in case assertion checks are disabled, force a definite memory fault at first access */
+            pTable = NULL;
+            break;
     }
 
     /* look number of envelopes in table */