EAP-pwd server: Make sure in_frag_pos is cleared to zero on allocation

The cleanup code will handle this, but it is more robust to make sure
this is cleared to zero when allocating a new buffer.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/eap_server/eap_server_pwd.c

@@ -963,6 +963,7 @@ static void eap_pwd_process(struct eap_sm *sm, void *priv,
 				   "buffer fragments!");
 			return;
 		}
+		data->in_frag_pos = 0;
 		pos += sizeof(u16);
 		len -= sizeof(u16);
 	}