Only included rpc.h when necessary

src/headers.h

@@ -120,7 +120,6 @@
 #include "script.h"
 #include "net.h"
 #include "main.h"
-#include "rpc.h"
 #ifdef GUI
 #include "uibase.h"
 #include "ui.h"

src/init.cpp

@@ -3,6 +3,7 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 #include "headers.h"
 #include "db.h"
+#include "rpc.h"
 
 using namespace std;
 using namespace boost;