nir: fix printing of vec16 type

Fixes: 2f181c8c18
       "glsl_types: vec8/vec16 support"

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Karol Herbst <kherbst@redhat.com>

src/compiler/nir/nir_print.c

@@ -88,6 +88,7 @@ print_register(nir_register *reg, print_state *state)
 
 static const char *sizes[] = { "error", "vec1", "vec2", "vec3", "vec4",
                                "error", "error", "error", "vec8",
+                               "error", "error", "error", "error",
                                "error", "error", "error", "vec16"};
 
 static void