fix bug#4: comparison of constant -1 with expression of type 'char' is always > true
fix bug#4: comparison of constant -1 with expression of type 'char' is always > true

repos-bitcoin/bitc,repos-bitcoin/bitc,dxtr/bitc,Methimpact/bitc,jma127/bitc-rpc,bit-c/bitc,Methimpact/bitc,bit-c/bitc,dxtr/bitc,repos-bitcoin/bitc,jma127/bitc-rpc,Methimpact/bitc,dxtr/bitc,bit-c/bitc,jma127/bitc-rpc