dthelp: Convert all K&R function definitions to ANSI (C90) standard

cde/programs/dthelp/parser/pass2/util/context.c

@@ -166,9 +166,7 @@ delim.h.
 #include "cont.h"
 
 /* Main procedure */
-int main(argc, argv)
-  int argc ;
-  char **argv ;
+int main(int argc, char **argv)
 {
 int n ;