Clean declaration

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

cores/arduino/stm32/bootloader.h

@@ -1,6 +1,9 @@
 #ifndef _BOOTLOADER_H_
 #define _BOOTLOADER_H_
 
+
+#include <stdint.h>
+
 /* Ensure DTR_TOGGLING_SEQ enabled */
 #if defined(BL_LEGACY_LEAF) || defined(BL_HID)
 #ifndef DTR_TOGGLING_SEQ
@@ -12,6 +15,11 @@
 extern "C" {
 #endif /* __cplusplus */
 
+#ifdef DTR_TOGGLING_SEQ
+/* DTR toggling sequence management */
+void dtr_togglingHook(uint8_t *buf, uint32_t *len);
+#endif
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */

cores/arduino/stm32/usb/cdc/usbd_cdc_if.c

@@ -56,8 +56,6 @@ __IO bool receivePended = true;
 static uint32_t transmitStart = 0;
 
 #ifdef DTR_TOGGLING_SEQ
-/* DTR toggling sequence management */
-extern void dtr_togglingHook(uint8_t *buf, uint32_t *len);
 uint8_t dtr_toggling = 0;
 #endif