[3.0] b28e204 typo

[Tollef Fog Heen]

commit b28e20472e7ca46859781854caf4c9aa7a1c6481
Author: Lasse Karstensen <lasse at varnish-software.com>
Date:   Mon Feb 6 14:29:39 2012 +0100

    typo

diff --git a/lib/libvcl/vcc_expr.c b/lib/libvcl/vcc_expr.c
index 1f1c274..0c885c0 100644
--- a/lib/libvcl/vcc_expr.c
+++ b/lib/libvcl/vcc_expr.c
@@ -51,7 +51,7 @@ vcc_Type(enum var_type fmt)
 #include "vcc_types.h"
 #undef VCC_TYPE
 	default:
-		assert("Unknwon Type");
+		assert("Unknown Type");
 		return(NULL);
 	}
 }