Expand toys.optargs to 64 bits so people adding more options to ls don't run out.
Keep the low 32 bits of FLAG_x constants as 32 bit numbers so that at least
on little endian platforms it's still normal 32 bit math outside of lib/args.c.
diff --git a/toys.h b/toys.h
index 9c33ff2..688d558 100644
--- a/toys.h
+++ b/toys.h
@@ -122,7 +122,7 @@
struct toy_list *which; // Which entry in toy_list is this one?
char **argv; // Original command line arguments
char **optargs; // Arguments left over from get_optflags()
- unsigned optflags; // Command line option flags from get_optflags()
+ unsigned long long optflags; // Command line option flags from get_optflags()
int exitval; // Value error_exit feeds to exit()
int optc; // Count of optargs
int old_umask; // Old umask preserved by TOYFLAG_UMASK