en50221: Increase MAX_CASYSTEM_IDS to 64 and fix inverted logic

As reported on forum, Powercam Pro returns 38 system IDs

modules/access/dvb/en50221.c

@@ -963,7 +963,7 @@ static void ApplicationInformationOpen( access_t * p_access, int i_session_id )
  * Conditional Access
  */
 
-#define MAX_CASYSTEM_IDS 16
+#define MAX_CASYSTEM_IDS 64
 
 typedef struct
 {
@@ -973,7 +973,7 @@ typedef struct
 static bool CheckSystemID( system_ids_t *p_ids, uint16_t i_id )
 {
     int i = 0;
-    if( !p_ids ) return true;
+    if( !p_ids ) return false;
 
     while ( p_ids->pi_system_ids[i] )
     {