Fix 1993/vanb for clang

The problem was the usual suspect where any arg other than the first was
not a char **. Instead O5 is no longer defined to be main() and it is
its own function now which main() calls. The third arg starts out as a
global variable that is passed into the function (which is recursive).

Now the output is correct.

1993/vanb/vanb.c

@@ -1,5 +1,6 @@
 #include <stdio.h>
-O5(O2,O7,O3)char**O7;{return!(O2+=~01+01)?00:!(O2-=02>01)?printf("\045\157\012"
+int O3;
+int O5(O2, O7, O3)char **O7;{return!(O2+=~01+01)?00:!(O2-=02>01)?printf("\045\157\012"
 ,O5(012,O7+01,00)):!(O2-=02>>01)?(**O7<=067&&**O7>057?O5(03,O7,*(*O7)++-060+010
    *O3):O3                     ):!(O2      -=-O3-      ~O3)?       (072>**
    O7&&060                     <=**O7      ?O5(04      ,O7,012     *O3-060
@@ -25,3 +26,4 @@ O5(O2,O7,O3)char**O7;{return!(O2+=~01+01)?00:!(O2-=02>01)?printf("\045\157\012"
              ,O7,O5(06,O7,                 00)):!(     O2+=-02/    02)?(!(*
 *O7-053)?O5(011,O7,O3+(++*O7,O5(010,O7,00))):!(055^**O7)?O5(011,O7,O3-(03+*(*O7
 )++,O5(0010,O7,00))):O3):!(O2-=0563&0215)?O5(011,O7,O5(010,O7,00)):(++*O7,O3);}
+main(O2,O7)char**O7;{return O5(O2,O7,O3);}