Enable Windows specific debug code in debug builds

win/CMakeLists.txt

@@ -2,6 +2,10 @@ include_directories(${CMAKE_SOURCE_DIR}/common ${CMAKE_SOURCE_DIR}/win)
 
 configure_file(resdefs.h.in ${CMAKE_CURRENT_BINARY_DIR}/resdefs.h)
 
+IF(CMAKE_BUILD_TYPE MATCHES Debug)
+  add_definitions(-D_DEBUG)
+ENDIF()
+
 add_subdirectory(rfb_win32)
 
 if(BUILD_WINVNC)