Fixed compiler warn: USB descriptor array elements

The compiler warning:

simtrace/usb.c:553:5: warning: initialization from incompatible pointer type [enabled by default]
     &configurationDescriptorSniffer,
     ^
simtrace/usb.c:553:5: warning: (near initialization for 'configurationDescriptorsArr[0]') [enabled by default]
simtrace/usb.c:554:5: warning: initialization from incompatible pointer type [enabled by default]
     &configurationDescriptorCCID,
     ^
simtrace/usb.c:554:5: warning: (near initialization for 'configurationDescriptorsArr[1]') [enabled by default]
simtrace/usb.c:555:5: warning: initialization from incompatible pointer type [enabled by default]
     &configurationDescriptorPhone,
     ^
simtrace/usb.c:555:5: warning: (near initialization for 'configurationDescriptorsArr[2]') [enabled by default]
simtrace/usb.c:556:5: warning: initialization from incompatible pointer type [enabled by default]
     &configurationDescriptorMITM,
     ^
simtrace/usb.c:556:5: warning: (near initialization for 'configurationDescriptorsArr[3]') [enabled by default]
simtrace/usb.c: In function 'getConfigDesc':
simtrace/usb.c:560:5: warning: return discards 'const' qualifier from pointer target type [enabled by default]
     return configurationDescriptorsArr[idx];
     ^
simtrace/usb.c: At top level:
diff --git a/sam3s_example/simtrace/usb.c b/sam3s_example/simtrace/usb.c
index 48b2b5d..f91c80c 100644
--- a/sam3s_example/simtrace/usb.c
+++ b/sam3s_example/simtrace/usb.c
@@ -550,10 +550,10 @@
 };
 
 const USBConfigurationDescriptor *configurationDescriptorsArr[] = {
-    &configurationDescriptorSniffer,
-    &configurationDescriptorCCID,
-    &configurationDescriptorPhone,
-    &configurationDescriptorMITM,
+    &configurationDescriptorSniffer.configuration,
+    &configurationDescriptorCCID.configuration,
+    &configurationDescriptorPhone.configuration,
+    &configurationDescriptorMITM.configuration,
 };
 
 USBConfigurationDescriptor *getConfigDesc(uint8_t idx) {