can: ctucanfd: initialize CAN message header on receive

The CAN message header was not fully initialized in
ctucanfd_chardev_receive(), which could result in uninitialized
fields and incorrect message contents being delivered to
upper-layer applications.

Signed-off-by: zhaohaiyang1 <zhaohaiyang1@xiaomi.com>

drivers/can/ctucanfd_pci.c

@@ -739,6 +739,8 @@ static void ctucanfd_chardev_receive(FAR struct ctucanfd_can_s *priv)
   uint16_t                     frc    = 0;
   uint32_t                     regval = 0;
 
+  memset(&hdr, 0, sizeof(hdr));
+
   /* Get frame count */
 
   regval = ctucanfd_getreg(priv, CTUCANFD_RXSETSTAT);