Update Messages.java

Returning the method if file is NOT found.

src/main/java/fr/xephi/authme/settings/Messages.java

@@ -25,7 +25,7 @@ public class Messages extends CustomConfiguration {
      *            The filename to open
      */
     public final void loadDefaults(File file) {
-        if (file.exists())
+        if (!file.exists())
             return;
 
         setDefaults(YamlConfiguration.loadConfiguration(file));