Some fixes to momentum

Joseph Redmon

2014-12-08 a99050f0c8cb0315fa31e3d1fa3e38594fe5e40a

 src/network_gpu.c

@@ -87,7 +87,7 @@
        }
        if(net.types[i] == CONVOLUTIONAL){
            convolutional_layer layer = *(convolutional_layer *)net.layers[i];
            backward_convolutional_layer_gpu(layer, prev_delta);
            backward_convolutional_layer_gpu(layer, prev_input, prev_delta);
        }
        else if(net.types[i] == COST){
            cost_layer layer = *(cost_layer *)net.layers[i];