remove casting to fix build error

Dependents:   RTC_Demo

Revision:
51:deafa44182d9
Parent:
47:a0cd9646ecd1
diff -r a3c50882f2c5 -r deafa44182d9 USBMSD/USBMSD.cpp
--- a/USBMSD/USBMSD.cpp	Mon Apr 20 10:45:54 2015 +0100
+++ b/USBMSD/USBMSD.cpp	Thu Apr 23 08:45:28 2015 +0100
@@ -135,10 +135,10 @@
 }
 
 void USBMSD::disconnect() {
+    USBDevice::disconnect();
     //De-allocate MSD page size:
     free(page);
     page = NULL;
-    USBDevice::disconnect();
 }
 
 void USBMSD::reset() {