use system memcpy and memset

code/qcommon/md4.c

@@ -38,8 +38,13 @@ void MD4Init (MD4_CTX *);
 void MD4Update (MD4_CTX *, const unsigned char *, unsigned int);
 void MD4Final (unsigned char [16], MD4_CTX *);
 
+#if I_WANT_A_CUSTOM_MEMCPY
 void Com_Memset (void* dest, const int val, const size_t count);
 void Com_Memcpy (void* dest, const void* src, const size_t count);
+#else
+#define Com_Memset memset
+#define Com_Memcpy memcpy
+#endif
 
 /* MD4C.C - RSA Data Security, Inc., MD4 message-digest algorithm */
 /* Copyright (C) 1990-2, RSA Data Security, Inc. All rights reserved.