hangs on mac, try to end transaction after cancel; refs #8

src/pcsc.hxx

@@ -362,12 +362,11 @@ namespace pcsc {
           /*! @note Micro$oft QinSCard does not know cancel, therefore
               on Windoze cancel is replaced by commit. */
           void cancelTransaction() {
-#ifdef WIN32
-            check(SCardEndTransaction(_id, SCARD_LEAVE_CARD),
-                  "smartcard end transaction");
-#else
+#ifndef WIN32
             check(SCardCancelTransaction(_id), "smartcard cancel transaction");
 #endif
+            check(SCardEndTransaction(_id, SCARD_LEAVE_CARD),
+                  "smartcard end transaction");
           }
 
           /*! @throw not_implemented if _protocol is unknown. */