To consider, AES-128-CTR as default option for 64-Bit, and Xoroshiro-…

…256 as default option for 32-Bit due to performance and quality reasons.

src/options.c

@@ -131,7 +131,7 @@ int nwipe_options_parse( int argc, char** argv )
     nwipe_options.autonuke = 0;
     nwipe_options.autopoweroff = 0;
     nwipe_options.method = &nwipe_dodshort;
-    nwipe_options.prng = ( sizeof( unsigned long int ) >= 8 ) ? &nwipe_isaac64 : &nwipe_isaac;
+    nwipe_options.prng = ( sizeof( unsigned long int ) >= 8 ) ? &nwipe_aes_ctr_prng : &nwipe_xoroshiro256_prng;
     nwipe_options.rounds = 1;
     nwipe_options.noblank = 0;
     nwipe_options.nousb = 0;