Fix the bug with ghost free_result Stability improvements
Fix the bug with ghost free_result
Stability improvements

mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,mjmichaels/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers,heapsource/nuodb-drivers