zero init internal class/device data

src/class/cdc/cdc_device.c

@@ -85,7 +85,7 @@ typedef struct
 //--------------------------------------------------------------------+
 // INTERNAL OBJECT & FUNCTION DECLARATION
 //--------------------------------------------------------------------+
-CFG_TUSB_MEM_SECTION static cdcd_interface_t _cdcd_itf[CFG_TUD_CDC];
+CFG_TUSB_MEM_SECTION static cdcd_interface_t _cdcd_itf[CFG_TUD_CDC] = { { 0 } };
 
 //--------------------------------------------------------------------+
 // APPLICATION API

src/class/hid/hid_device.c

@@ -91,7 +91,7 @@ typedef struct
   hidd_interface_t* itf;
 } hidd_report_t ;
 
-CFG_TUSB_MEM_SECTION static hidd_interface_t _hidd_itf[ITF_COUNT];
+CFG_TUSB_MEM_SECTION static hidd_interface_t _hidd_itf[ITF_COUNT] = { { 0 } };
 
 
 #if CFG_TUD_HID_KEYBOARD

src/class/msc/msc_device.c

@@ -83,7 +83,7 @@ typedef struct {
   uint8_t add_sense_qualifier;
 }mscd_interface_t;
 
-CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static mscd_interface_t _mscd_itf;
+CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static mscd_interface_t _mscd_itf = { 0 };
 CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static uint8_t _mscd_buf[CFG_TUD_MSC_BUFSIZE];
 
 //--------------------------------------------------------------------+