Fix typo.

78c7c871 · Leigh B. Stoller · bb567947 · 78c7c871
Commit 78c7c871 authored Apr 09, 2004 by Leigh B. Stoller
--- a/tbsetup/ns2ir/lanlink.tcl
+++ b/tbsetup/ns2ir/lanlink.tcl
@@ -467,7 +467,7 @@ Link instproc updatedb {DB} {
    $self instvar netmask
    $self instvar protocol

-    if {protocol != "ethernet"} {
+    if {$protocol != "ethernet"} {
 	perror "Link must be an ethernet only, not a $protocol"
 	return
    }