Fix zero arg segfault in 2020/burton

I did not fix the strange output when more than one arg is specified nor
do I think I should.

I did not update Dave's comment that it will segfault on zero args nor
do I think I should (instead I updated the To run section like I've done
with the many others I've fixed).

2020/burton/README.md

@@ -1,8 +1,8 @@
 # Best one-liner
 
-Dave Burton
-<http://snox.net/ioccc>
-Twitter: @lv2jmp
+    Dave Burton
+    <http://snox.net/ioccc>
+    Twitter: @lv2jmp
 
 ## To build:
 
@@ -16,7 +16,11 @@ make
 ./prog arg ...
 ```
 
-NOTE: this entry will dump core if you do not specify an argument.
+[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) made this entry not
+segfault when no arg is specified though he notes that the author says it will
+segfault on zero args. He did NOT fix the strange results when more than one arg
+is specified. Thank you Cody for your assistance!
+
 
 ## Try:
 

2020/burton/prog.c

@@ -1 +1 @@
-int main(int b,char**i){long long n=B,a=I^n,r=(a/b&a)>>4,y=atoi(*++i),_=(((a^n/b)*(y>>T)|y>>S)&r)|(a^r);printf("%.8s\n",(char*)&_);}
+int main(int b,char**i){if(1[i]){long long n=B,a=I^n,r=(a/b&a)>>4,y=atoi(*++i),_=(((a^n/b)*(y>>T)|y>>S)&r)|(a^r);printf("%.8s\n",(char*)&_);}}