cmake: add FFmpeg components as argument to find_package

test/CMakeLists.txt

@@ -323,8 +323,7 @@ files2headers(gamepad_image_headers
 files2headers(icon_png_header icon.png)
 files2headers(glass_png_header glass.png)
 
-set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE)
-find_package(FFmpeg)
+find_package(FFmpeg COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE)
 if(FFmpeg_FOUND)
     cmake_push_check_state()
     list(APPEND CMAKE_REQUIRED_INCLUDES "${FFmpeg_AVUTIL_INCLUDE_DIRS}")