Making a pointer version of network_predict for python.

The python binding requires the network struct to be passed
as a pointer to it rather than a struct copy.

darknet.py

@@ -125,7 +125,7 @@ lib.network_width.restype = c_int
 lib.network_height.argtypes = [c_void_p]
 lib.network_height.restype = c_int
 
-predict = lib.network_predict
+predict = lib.network_predict_ptr
 predict.argtypes = [c_void_p, POINTER(c_float)]
 predict.restype = POINTER(c_float)
 

src/network.c

@@ -556,6 +556,12 @@ void top_predictions(network net, int k, int *index)
     top_k(out, size, k, index);
 }
 
+// A version of network_predict that uses a pointer for the network
+// struct to make the python binding work properly.
+float *network_predict_ptr(network *net, float *input)
+{
+    return network_predict(*net, input);
+}
 
 float *network_predict(network net, float *input)
 {

src/network.h

@@ -122,6 +122,7 @@ float train_network_datum(network net, float *x, float *y);
 
 matrix network_predict_data(network net, data test);
 //LIB_API float *network_predict(network net, float *input);
+LIB_API float *network_predict_ptr(network *net, float *input);
 float network_accuracy(network net, data d);
 float *network_accuracies(network net, data d, int n);
 float network_accuracy_multi(network net, data d, int n);