AP_PiccoloCAN: fixed build error on Linux

_thread_name too short

libraries/AP_PiccoloCAN/AP_PiccoloCAN.cpp

@@ -365,7 +365,7 @@ void AP_PiccoloCAN::send_esc_messages(void)
     if (hal.util->get_soft_armed()) {
 
         bool send_cmd = false;
-        int16_t cmd[4];
+        int16_t cmd[4] {};
         uint8_t idx;
 
         // Transmit bulk command packets to 4x ESC simultaneously

libraries/AP_PiccoloCAN/AP_PiccoloCAN.h

@@ -99,7 +99,7 @@ private:
     bool handle_esc_message(uavcan::CanFrame &frame);
 
     bool _initialized;
-    char _thread_name[9];
+    char _thread_name[16];
     uint8_t _driver_index;
     uavcan::ICanDriver* _can_driver;
     const uavcan::CanFrame* _select_frames[uavcan::MaxCanIfaces] { };