Pack the authentication window just before showing it.

src/net/java/sip/communicator/impl/gui/main/login/DefaultSecurityAuthority.java

@@ -82,7 +82,6 @@ public UserCredentials obtainCredentials(
                                         isUserNameEditable,
                                         icon);
 
-        loginWindow.pack();
         loginWindow.setVisible(true);
 
         if (!loginWindow.isCanceled())

src/net/java/sip/communicator/impl/gui/main/login/SecurityAuthorityImpl.java

@@ -88,7 +88,6 @@ public UserCredentials obtainCredentials(
                 icon,
                 errorMessage);
 
-        loginWindow.pack();
         loginWindow.setVisible(true);
 
         if (!loginWindow.isCanceled())

src/net/java/sip/communicator/util/swing/AuthenticationWindow.java

@@ -127,10 +127,10 @@ public AuthenticationWindow(String server,
         this.server = server;
 
         Image logoImage = null;
-        
+
         if(icon != null)
         {
-        	logoImage = icon.getImage();
+            logoImage = icon.getImage();
         }
 
         if(!isUserNameEditable)
@@ -406,6 +406,8 @@ public void setVisible(boolean isVisible)
     {
         this.setName("AUTHENTICATION");
 
+        pack();
+
         super.setVisible(isVisible);
 
         if(isVisible)