ndb/include/ndbapi/NdbOperation.hpp:
  change char* -> void*
ndb/include/ndbapi/NdbScanFilter.hpp:
  Add generic cmp-function
  Let "old" function use the new one
ndb/src/kernel/blocks/dbtup/DbtupExecQuery.cpp:
  Add support for all types for scan filters
ndb/src/ndbapi/NdbOperationInt.cpp:
  Check length of argument
ndb/src/ndbapi/NdbScanFilter.cpp:
  Add support for all types for scan filters