Fix some gcc warnings

SoObjects/SOGo/SOGoCASSession.m

@@ -113,7 +113,6 @@
 + (void) handleLogoutRequest: (NSString *) logoutRequest
 {
   CASLogoutRequest *rq;
-  SOGoCache *cache;
   NSBundle *bundle;
   NSString *mapFile, *sessionIndex;
 

SoObjects/SOGo/SOGoUser.m

@@ -37,6 +37,7 @@
 #import <NGExtensions/NSObject+Logs.h>
 
 #import <Appointments/SOGoAppointmentFolders.h>
+#import <Contacts/SOGoContactFolders.h>
 
 #import "NSArray+Utilities.h"
 #import "SOGoCache.h"

SoObjects/SOGo/SOGoUserManager.m

@@ -18,6 +18,7 @@
  * Boston, MA 02111-1307, USA.
  */
 #import <Foundation/NSArray.h>
+#import <Foundation/NSCalendarDate.h>
 #import <Foundation/NSDictionary.h>
 #import <Foundation/NSEnumerator.h>
 #import <Foundation/NSException.h>