- Reserve enough space on the heap to store the GUID

- Thanks to Thomas for restoring my sanity

svn path=/trunk/; revision=24291

reactos/base/applications/devmgmt/enumdevices.c

@@ -151,7 +151,9 @@ EnumDevices(INT index,
 
     if (!bRet)
     {
-        guids = HeapAlloc(GetProcessHeap(), 0, RequiredSize);
+        guids = HeapAlloc(GetProcessHeap(), 
+                          0, 
+                          RequiredSize * sizeof(GUID));
         if (guids == NULL)
             return -1;