am7xxx: split declaration and initialization of the "transferred" variable

This makes it clearer than we mean to initialize the variable to
0 before _each_ libusb_bulk_transfer() call.

diff --git a/src/am7xxx.c b/src/am7xxx.c
index 94b01ac..d619f89 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -381,8 +381,9 @@ static void trace_dump_buffer(am7xxx_context *ctx, const char *message,
 static int read_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
 {
        int ret;
-       int transferred = 0;
+       int transferred;
 
+       transferred = 0;
        ret = libusb_bulk_transfer(dev->usb_device, 0x81, buffer, len, &transferred, 0);
        if (ret != 0 || (unsigned int)transferred != len) {
                error(dev->ctx, "%s. Transferred: %d (expected %u)\n",
@@ -398,10 +399,11 @@ static int read_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
 static int send_data(am7xxx_device *dev, uint8_t *buffer, unsigned int len)
 {
        int ret;
-       int transferred = 0;
+       int transferred;
 
        trace_dump_buffer(dev->ctx, "sending -->", buffer, len);
 
+       transferred = 0;
        ret = libusb_bulk_transfer(dev->usb_device, 0x1, buffer, len, &transferred, 0);
        if (ret != 0 || (unsigned int)transferred != len) {
                error(dev->ctx, "%s. Transferred: %d (expected %u)\n",