fix pk_oid_num_to_str + const

Author: karel-m

src/headers/tomcrypt_pk.h

@@ -43,7 +43,7 @@ typedef struct Oid {
 
 int pk_get_oid(int pk, oid_st *st);
 int pk_oid_str_to_num(const char *OID, unsigned long *oid, unsigned long *oidlen);
-int pk_oid_num_to_str(unsigned long *oid, unsigned long oidlen, char *OID, unsigned long *outlen);
+int pk_oid_num_to_str(const unsigned long *oid, unsigned long oidlen, char *OID, unsigned long *outlen);
 #endif /* LTC_SOURCE */
 
 /* ---- RSA ---- */

src/misc/pk_oid_str.c

@@ -38,7 +38,7 @@ int pk_oid_str_to_num(const char *OID, unsigned long *oid, unsigned long *oidlen
    return CRYPT_OK;
 }
 
-int pk_oid_num_to_str(unsigned long *oid, unsigned long oidlen, char *OID, unsigned long *outlen)
+int pk_oid_num_to_str(const unsigned long *oid, unsigned long oidlen, char *OID, unsigned long *outlen)
 {
    int i;
    unsigned long j, k;