Fix printing of invalid arguments of term ioctls

* term.c (term_ioctl): Print arguments of TCXONC and TCFLSH ioctls
using printxval_long.
diff --git a/term.c b/term.c
index c913a46..530ffc4 100644
--- a/term.c
+++ b/term.c
@@ -222,11 +222,11 @@
 	/* ioctls with a direct decodable arg */
 	case TCXONC:
 		tprints(", ");
-		printxval(tcxonc_options, arg, "TC???");
+		printxval_long(tcxonc_options, arg, "TC???");
 		break;
 	case TCFLSH:
 		tprints(", ");
-		printxval(tcflsh_options, arg, "TC???");
+		printxval_long(tcflsh_options, arg, "TC???");
 		break;
 	case TCSBRK:
 	case TCSBRKP: