Fixed captcha command dependency initializing too early

src/main/java/fr/xephi/authme/command/executable/captcha/CaptchaCommand.java

@@ -12,11 +12,6 @@ import org.bukkit.entity.Player;
 
 public class CaptchaCommand extends ExecutableCommand {
 
-    /**
-     * RandomString instance, for captcha generation.
-     */
-    public static RandomString randStr = new RandomString(Settings.captchaLength);
-
     /**
      * Execute the command.
      *
@@ -34,6 +29,9 @@ public class CaptchaCommand extends ExecutableCommand {
         // Messages instance
         final Messages m = Messages.getInstance();
 
+        // Random string instance, for captcha generation (I think) -- timvisee
+        RandomString randStr = new RandomString(Settings.captchaLength);
+
         // Get the parameter values
         String captcha = commandArguments.get(0);