use the new COPYRIGHT_YEAR macro in bitcoin-qt.rc

- this reduces the places, where we need to change the year further

src/qt/res/bitcoin-qt.rc

@@ -7,6 +7,7 @@ IDI_ICON1 ICON DISCARDABLE "icons/bitcoin.ico"
 #define VER_PRODUCTVERSION_STR STRINGIZE(CLIENT_VERSION_MAJOR) "." STRINGIZE(CLIENT_VERSION_MINOR) "." STRINGIZE(CLIENT_VERSION_REVISION) "." STRINGIZE(CLIENT_VERSION_BUILD)
 #define VER_FILEVERSION        VER_PRODUCTVERSION
 #define VER_FILEVERSION_STR    VER_PRODUCTVERSION_STR
+#define COPYRIGHT_STR          "2009-" STRINGIZE(COPYRIGHT_YEAR) " The Bitcoin developers"
 
 VS_VERSION_INFO VERSIONINFO
 FILEVERSION     VER_FILEVERSION
@@ -22,7 +23,7 @@ BEGIN
             VALUE "FileDescription",    "Bitcoin-Qt (OSS GUI client for Bitcoin)"
             VALUE "FileVersion",        VER_FILEVERSION_STR
             VALUE "InternalName",       "bitcoin-qt"
-            VALUE "LegalCopyright",     "2009-2013 The Bitcoin developers"
+            VALUE "LegalCopyright",     COPYRIGHT_STR
             VALUE "LegalTrademarks1",   "Distributed under the MIT/X11 software license, see the accompanying file COPYING or http://www.opensource.org/licenses/mit-license.php."
             VALUE "OriginalFilename",   "bitcoin-qt.exe"
             VALUE "ProductName",        "Bitcoin-Qt"