fixed c_str() typo

src/MediocreSimpleStaticFileHandler.cc

@@ -13,7 +13,7 @@ class MediocreSimpleStaticFileHandler :StaticFileHandler
 		int answer_pathreq(const char * const path,
 				struct mg_connection *conn)
 		{
-			mg_send_file(conn,cleanpath(path).to_cstring());
+			mg_send_file(conn,cleanpath(path).c_str());
 			return 0;
 		}
 }