arith: move c_unum and unum declaration into lib.h

The c_unum and unum functions are fairly often needed
and and are closely related to c_num and num, which have
always been declared in lib.h even though they live in
arith.c. Files not doing arithmetic are including "arith.h"
just for the sake of c_num or unum.

* arith.h (c_unum, unum): Declarations removed.

* lib.h (c_unum, unum): Declarations moved here.

* chksum.c, debug.c, stream.c,  strudel.c, sysif.c, vm.c:
These files no longer require #include "arith.h" as a result,
which is therefore removed.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index f039568f..e8cc31d6 100644
--- a/lib.h
+++ b/lib.h
@@ -711,8 +711,10 @@ val memp(val key, val plist);
 val plist_to_alist(val list);
 val improper_plist_to_alist(val list, val boolean_keys);
 val num(cnum val);
+val unum(ucnum u);
 val flo(double val);
 cnum c_num(val num);
+ucnum c_unum(val num);
 cnum c_fixnum(val num, val self);
 double c_flo(val self, val num);
 val fixnump(val num);