check new return value (-2 if the key does not exist)
check new return value (-2 if the key does not exist)

r-kovalenko/Rediska,Shumkov/Rediska,AlphaStaxLLC/Rediska,webonyx/Rediska,AlphaStaxLLC/Rediska,Shumkov/Rediska,r-kovalenko/Rediska