wolfcrypt/src/cmac.c: mitigate clang-analyzer-deadcode.DeadStores in wc_CmacUpdate().

Author: douzzer

wolfcrypt/src/cmac.c

@@ -248,6 +248,7 @@ int wc_CmacUpdate(Cmac* cmac, const byte* in, word32 inSz)
             }
         }
 #else
+        (void)ret;
         ret = wc_CmacUpdateAes(cmac, in, inSz);
 #endif
     }; break;