ndb - bug#20683

  part 1 - make sure return code is propagated from request tracker


ndb/src/kernel/vm/RequestTracker.hpp:
  propagate return value
ndb/src/kernel/vm/SafeCounter.hpp:
  make sure object is not initialized in case of seize() failure, to make sure destructor doesnt assert

ndb/src/kernel/vm/RequestTracker.hpp

@@ -26,12 +26,12 @@ public:
   void init() { m_confs.clear(); m_nRefs = 0; }
 
   template<typename SignalClass>
-  void init(SafeCounterManager& mgr,
+  bool init(SafeCounterManager& mgr,
 	    NodeReceiverGroup rg, Uint16 GSN, Uint32 senderData)
   {
     init();
     SafeCounter tmp(mgr, m_sc);
-    tmp.init<SignalClass>(rg, GSN, senderData);
+    return tmp.init<SignalClass>(rg, GSN, senderData);
   }
 
   bool ignoreRef(SafeCounterManager& mgr, Uint32 nodeId)

ndb/src/kernel/vm/SafeCounter.hpp

@@ -230,10 +230,13 @@ inline
 bool
 SafeCounter::init(NodeReceiverGroup rg, Uint16 GSN, Uint32 senderData){
   
-  bool b = init<Ref>(rg.m_block, GSN, senderData);
+  if (init<Ref>(rg.m_block, GSN, senderData))
+  {
     m_nodes = rg.m_nodes;
     m_count = m_nodes.count();
-  return b;
+    return true;
+  }
+  return false;
 }
 
 template<typename Ref>
@@ -241,10 +244,13 @@ inline
 bool
 SafeCounter::init(NodeReceiverGroup rg, Uint32 senderData){
   
-  bool b = init<Ref>(rg.m_block, Ref::GSN, senderData);
+  if (init<Ref>(rg.m_block, Ref::GSN, senderData))
+  {
     m_nodes = rg.m_nodes;
     m_count = m_nodes.count();
-  return b;
+    return true;
+  }
+  return false;
 }
 
 inline