fix building cycles standalone on windows / cmake

CMakeLists.txt

@@ -2258,7 +2258,7 @@ if(WITH_BLENDER OR WITH_PLAYER)
 	add_subdirectory(extern)
 elseif(WITH_CYCLES_STANDALONE)
 	add_subdirectory(intern/cycles)
-	if(WITH_CYCLES_STANDALONE_GUI)
+	if(NOT WITH_SYSTEM_GLEW)
 		add_subdirectory(extern/glew)
 	endif()
 endif()

intern/cycles/app/CMakeLists.txt

@@ -54,6 +54,7 @@ if(WITH_CYCLES_STANDALONE)
 		cycles_xml.h
 	)
 	add_executable(cycles ${SRC})
+	list(APPEND LIBRARIES ${PLATFORM_LINKLIBS})
 	target_link_libraries(cycles ${LIBRARIES} ${CMAKE_DL_LIBS})
 
 	if(UNIX AND NOT APPLE)