portability fix for MACOSX bugreport 3735

ndb/src/ndbapi/Ndberr.cpp:
  Rename: ndb/src/ndbapi/Ndberror.cpp -> ndb/src/ndbapi/Ndberr.cpp

ndb/src/ndbapi/Makefile

@@ -31,7 +31,7 @@ SOURCES = \
         Ndblist.cpp     \
         Ndbif.cpp       \
         Ndbinit.cpp     \
-        Ndberror.cpp    \
+        Ndberr.cpp    \
         ndberror.c    \
         NdbErrorOut.cpp    \
         NdbConnection.cpp       \