Fixed test input file not found when doing out-of-source builds.

CMakeLists.txt

@@ -32,6 +32,7 @@ else(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
 	add_custom_target(
 		${TARGET_DATA_COPY}
 		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/resources/dream.xml ${CMAKE_CURRENT_BINARY_DIR}/resources/
+		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/resources/empty.xml ${CMAKE_CURRENT_BINARY_DIR}/resources/
 		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/resources/utf8test.xml ${CMAKE_CURRENT_BINARY_DIR}/resources/
 		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/resources/utf8testverify.xml ${CMAKE_CURRENT_BINARY_DIR}/resources/)
 endif(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})