fixed compiler warnings

src/class/cdc/cdc_host.c

@@ -1170,9 +1170,9 @@ static bool ftdi_change_speed(cdch_interface_t * p_cdc, tuh_xfer_cb_t complete_c
 
 static bool ftdi_set_data_request(cdch_interface_t * p_cdc, tuh_xfer_cb_t complete_cb, uintptr_t user_data) {
   TU_VERIFY(p_cdc->requested_line_coding.data_bits >= 7 && p_cdc->requested_line_coding.data_bits <= 8, 0);
-  uint16_t value = (p_cdc->requested_line_coding.data_bits & 0xfu)       |  // data bit quantity is stored in bits 0-3
-                   (p_cdc->requested_line_coding.parity    & 0x7u) <<  8 |  // parity is stored in bits 8-10, same coding
-                   (p_cdc->requested_line_coding.stop_bits & 0x3u) << 11;   // stop bits quantity is stored in bits 11-12, same coding
+  uint16_t value = (p_cdc->requested_line_coding.data_bits & (uint16_t) 0xfu)       |  // data bit quantity is stored in bits 0-3
+                   (p_cdc->requested_line_coding.parity    & (uint16_t) 0x7u) <<  8 |  // parity is stored in bits 8-10, same coding
+                   (p_cdc->requested_line_coding.stop_bits & (uint16_t) 0x3u) << 11;   // stop bits quantity is stored in bits 11-12, same coding
                                                                             // not each FTDI supports 1.5 stop bits
 
   return ftdi_set_request(p_cdc, FTDI_SIO_SET_DATA_REQUEST, FTDI_SIO_SET_DATA_REQUEST_TYPE,
@@ -1703,9 +1703,9 @@ static bool cp210x_set_baudrate_request(cdch_interface_t * p_cdc, tuh_xfer_cb_t
 
 static bool cp210x_set_line_ctl(cdch_interface_t * p_cdc, tuh_xfer_cb_t complete_cb, uintptr_t user_data) {
   TU_VERIFY(p_cdc->requested_line_coding.data_bits >= 5 && p_cdc->requested_line_coding.data_bits <= 9, 0);
-  uint16_t lcr = (p_cdc->requested_line_coding.data_bits & 0xfu) << 8 | // data bit quantity is stored in bits 8-11
-                 (p_cdc->requested_line_coding.parity    & 0xfu) << 4 | // parity is stored in bits 4-7, same coding
-                 (p_cdc->requested_line_coding.stop_bits & 0xfu);       // parity is stored in bits 0-3, same coding
+  uint16_t lcr = (p_cdc->requested_line_coding.data_bits & (uint16_t) 0xfu) << 8 | // data bit quantity is stored in bits 8-11
+                 (p_cdc->requested_line_coding.parity    & (uint16_t) 0xfu) << 4 | // parity is stored in bits 4-7, same coding
+                 (p_cdc->requested_line_coding.stop_bits & (uint16_t) 0xfu);       // parity is stored in bits 0-3, same coding
 
   return cp210x_set_request(p_cdc, CP210X_SET_LINE_CTL, lcr, NULL, 0, complete_cb, user_data);
 }