Fixed cppcheck report

Author: danielinux

hal/stm32l5.c

@@ -130,7 +130,7 @@ static int uds_from_uid(uint8_t *out, size_t out_len)
     uint8_t digest[SHA3_384_DIGEST_SIZE];
     wc_Sha3 hash;
 #endif
-    size_t copy_len;
+    size_t copy_len = 0;
 
     if (out == NULL || out_len == 0) {
         return -1;