Always install a (valid) _new file if we have one.

Thanks to deepfreeze32 for the suggested fix.

src/main/java/com/threerings/getdown/data/Application.java

@@ -1312,9 +1312,8 @@ public class Application
 
             try {
                 if (_digest.validateResource(rsrc, robs)) {
-                    // if the resource is valid but has no _local file, add it to to-install list
+                    // if the resource has a _new file, add it to to-install list
-                    if (!toInstall.contains(rsrc) && !rsrc.getLocal().exists() &&
+                    if (!toInstall.contains(rsrc) && rsrc.getLocalNew().exists()) {
-                        rsrc.getLocalNew().exists()) {
                         toInstall.add(rsrc);
                         continue;
                     }