Check wc_Chacha_SetIV return value

Author: JeremiahM37

wolfcrypt/ciphers.py

@@ -514,13 +514,13 @@ def _set_key(self, direction):
             if self._enc:
                 ret = _lib.wc_Chacha_SetKey(self._enc, self._key, len(self._key))
                 if ret == 0:
-                    _lib.wc_Chacha_SetIV(self._enc, self._IV_nonce, self._IV_counter)
+                    ret = _lib.wc_Chacha_SetIV(self._enc, self._IV_nonce, self._IV_counter)
                 if ret != 0:
                     return ret
             if self._dec:
                 ret = _lib.wc_Chacha_SetKey(self._dec, self._key, len(self._key))
                 if ret == 0:
-                    _lib.wc_Chacha_SetIV(self._dec, self._IV_nonce, self._IV_counter)
+                    ret = _lib.wc_Chacha_SetIV(self._dec, self._IV_nonce, self._IV_counter)
                 if ret != 0:
                     return ret
             return 0