Fix a few warnings

Author: elmarco

src/builder.vala

@@ -71,9 +71,6 @@ namespace Wixl {
             return elems;
         }
 
-        public void add_custom_actions<G> (MsiTableSequence table) {
-        }
-
         delegate void AddSequence (string action, int sequence) throws GLib.Error;
 
         private void sequence_actions () throws GLib.Error {
@@ -205,8 +202,10 @@ namespace Wixl {
         string[] secureProperties;
 
         public void property_update () throws GLib.Error {
-            var prop = string.joinv (";", secureProperties);
-            db.table_property.add ("SecureCustomProperties", prop);
+            if (secureProperties.length != 0) {
+                var prop = string.joinv (";", secureProperties);
+                db.table_property.add ("SecureCustomProperties", prop);
+            }
         }
 
         public MsiDatabase build () throws GLib.Error {

src/msi.vala

@@ -120,7 +120,7 @@ namespace Wixl {
             }
         }
 
-        public void add_sorted_actions () {
+        public void add_sorted_actions () throws GLib.Error {
             add_implicit_deps ();
             var sorted = sort_topological ();
 

src/wixl.vala

@@ -78,7 +78,7 @@ namespace Wixl {
                 return 0;
 
             if (verbose)
-                print ("Building %s...\n", files[0]);
+                print ("Building %s...\n", output);
             var msi = builder.build ();
             msi.build (output);
         } catch (GLib.Error error) {