Fix all header defines

src/qt/paymentrequestplus.h

@@ -2,8 +2,8 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#ifndef PAYMENTREQUESTPLUS_H
-#define PAYMENTREQUESTPLUS_H
+#ifndef BITCOIN_QT_PAYMENTREQUESTPLUS_H
+#define BITCOIN_QT_PAYMENTREQUESTPLUS_H
 
 #include "paymentrequest.pb.h"
 
@@ -42,5 +42,4 @@ private:
     payments::PaymentDetails details;
 };
 
-#endif // PAYMENTREQUESTPLUS_H
-
+#endif // BITCOIN_QT_PAYMENTREQUESTPLUS_H