BUG#18594 ndb_restore log boken in 5.1

- corrected log read after fragment id addition

storage/ndb/src/kernel/blocks/backup/BackupFormat.hpp

@@ -144,7 +144,7 @@ struct BackupFormat {
       // If TriggerEvent & 0x10000 == true then GCI is right after data
       Uint32 TriggerEvent;
       Uint32 FragId;
-      Uint32 Data[1]; // Len = Length - 2
+      Uint32 Data[1]; // Len = Length - 3
     };
   };
 

storage/ndb/tools/restore/Restore.cpp

@@ -1036,7 +1036,7 @@ RestoreLogIterator::getNextLogEntry(int & res, bool *alloc_flag) {
   m_logEntry.clear();
 
   AttributeHeader * ah = (AttributeHeader *)&logE->Data[0];
-  AttributeHeader *end = (AttributeHeader *)&logE->Data[len - 2];
+  AttributeHeader *end = (AttributeHeader *)&logE->Data[len - 3];
   AttributeS *  attr;
   m_logEntry.m_frag_id = ntohl(logE->FragId);
   while(ah < end){