Bignum library bug fix. IRIX 6 passes "make test" now!
This also avoids the problems with SC4.2 and unpatched SC5.

Submitted by: Andy Polyakov <appro@fy.chalmers.se>
diff --git a/config b/config
index 3ddf4bb..484f793 100755
--- a/config
+++ b/config
@@ -286,9 +286,9 @@
   if [ "$SYSTEM" = "SunOS" ]
   then
    case `cc -V 2>&1` in
-    *4*) CC=sc4;;
-    *5*) CC=sc5;;
-    *) CC=cc;;
+    *4*) CC=cc;;
+    *5*) CC=cc;;
+    *) CC=sc3;;
    esac
   fi
 fi