Fix build on Windows (using cmake and nmake).

examples/nfc-list.c

@@ -55,13 +55,14 @@ int main(int argc, const char* argv[])
   size_t i;
   nfc_target_info_t nti;
   nfc_device_desc_t *pnddDevices;
+  const char* acLibnfcVersion;
 
   if (argc > 1) {
     errx (1, "usage: %s", argv[0]);
   }
 
   // Display libnfc version
-  const char* acLibnfcVersion = nfc_version();
+  acLibnfcVersion = nfc_version();
   printf("%s use libnfc %s\n", argv[0], acLibnfcVersion);
 
   #ifdef HAVE_LIBUSB