IOSAD-157 Make the adapter compile

pEpObjCAdapter/PEPInternalSession.m

@@ -24,6 +24,7 @@
 #import "PEPAutoPointer.h"
 #import "NSNumber+PEPRating.h"
 #import "NSMutableDictionary+PEP.h"
+#import "PEPSync.h"
 #import "PEPSync_Internal.h" // for [PEPSync createSession:]
 #import "PEPInternalConstants.h"
 

pEpObjCAdapter/PEPSync_Internal.h

@@ -12,7 +12,7 @@
 /**
  Internal methods of PEPSync.
  */
-@interface PEPSync : NSObject
+@interface PEPSync ()
 
 /**
  Creates an engine session (PEP_SESSION).