Fix some bugs about USBHost common codes.

Find some bugs in USBHost common codes. Bugs as below.
- USBHostMouse.cpp
　- Memory destroy will occur when the size of interrupt transfer is larger than 4 bytes.

- USBHostMSD.cpp
　- Type declaration of vender dependent.
    　U16　-> uint16_t

- USBHostSerial.cpp
  - connected() will not be "true".
  - Communication with USBSerial will not start.

libraries/USBHost/USBHostHID/USBHostMouse.cpp

@@ -47,6 +47,7 @@ bool USBHostMouse::connected() {
 }
 
 bool USBHostMouse::connect() {
+    int len_listen;
 
     if (dev_connected) {
         return true;
@@ -69,7 +70,11 @@ bool USBHostMouse::connect() {
                 host->registerDriver(dev, mouse_intf, this, &USBHostMouse::init);
 
                 int_in->attach(this, &USBHostMouse::rxHandler);
-                host->interruptRead(dev, int_in, report, int_in->getSize(), false);
+                len_listen = int_in->getSize();
+                if (len_listen > sizeof(report)) {
+                    len_listen = sizeof(report);
+                }
+                host->interruptRead(dev, int_in, report, len_listen, false);
 
                 dev_connected = true;
                 return true;
@@ -109,6 +114,10 @@ void USBHostMouse::rxHandler() {
     y = report[2];
     z = report[3];
 
+    if (len_listen > sizeof(report)) {
+        len_listen = sizeof(report);
+    }
+
     if (dev)
         host->interruptRead(dev, int_in, report, len_listen, false);
 }

libraries/USBHost/USBHostMSD/USBHostMSD.cpp

@@ -303,7 +303,7 @@ int USBHostMSD::getMaxLun() {
 
 int USBHostMSD::disk_initialize() {
     USB_DBG("FILESYSTEM: init");
-    U16 i, timeout = 10;
+    uint16_t i, timeout = 10;
 
     getMaxLun();
 

libraries/USBHost/USBHostSerial/USBHostSerial.cpp

@@ -71,6 +71,7 @@ bool USBHostSerial::connect() {
             {
                 USBHostSerialPort::connect(host,d,port_intf,bulk_in, bulk_out);
                 dev = d;
+                dev_connected = true;
             }
         }
     }
@@ -171,6 +172,7 @@ bool USBHostMultiSerial::connect() {
                     {
                         ports[port]->connect(host,d,port_intf[port],bulk_in, bulk_out);
                         dev = d;
+                        dev_connected = true;
                     }
                 }
             }
@@ -242,7 +244,7 @@ void USBHostSerialPort::connect(USBHost* _host, USBDeviceConnected * _dev,
     USB_INFO("New Serial device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, serial_intf);
     dev->setName("Serial", serial_intf);
     host->registerDriver(dev, serial_intf, this, &USBHostSerialPort::init);
-    //baud(9600);
+    baud(9600);
     size_bulk_in = bulk_in->getSize();
     size_bulk_out = bulk_out->getSize();
     bulk_in->attach(this, &USBHostSerialPort::rxHandler);