USB: silence warning when debug output is disabled

diff --git a/src/libs/USBDevice/USB.cpp b/src/libs/USBDevice/USB.cpp
index 9ff28a0..3f1d935 100644 (file)
--- a/src/libs/USBDevice/USB.cpp
+++ b/src/libs/USBDevice/USB.cpp
@@ -577,15 +577,21 @@ void USB::dumpCDC(uint8_t *d) {
        switch(d[2]) {
                case USB_CDC_SUBTYPE_HEADER: {
                        usbcdc_header *h = (usbcdc_header *) d;
-                       iprintf("\t\t*CDC header\n");
-                       iprintf("\t\t\tbcdCDC:  0x%04X\n", h->bcdCDC);
+            if (h)
+            {
+                iprintf("\t\t*CDC header\n");
+                iprintf("\t\t\tbcdCDC:  0x%04X\n", h->bcdCDC);
+            }
                        break;
                }
                case USB_CDC_SUBTYPE_UNION: {
                        usbcdc_union *u = (usbcdc_union *) d;
-                       iprintf("\t\t*CDC union\n");
-                       iprintf("\t\t\tMaster:  %d\n", u->bMasterInterface);
-                       iprintf("\t\t\tSlave:   %d\n", u->bSlaveInterface0);
+            if (u)
+            {
+                iprintf("\t\t*CDC union\n");
+                iprintf("\t\t\tMaster:  %d\n", u->bMasterInterface);
+                iprintf("\t\t\tSlave:   %d\n", u->bSlaveInterface0);
+            }
                        break;
                }
                case USB_CDC_SUBTYPE_CALL_MANAGEMENT: {