ffmpeg: fixed headers dependency on libavcodec for gfx_*.cpp.

src/add-ons/media/plugins/ffmpeg/Jamfile

@@ -17,6 +17,11 @@ local sources =
 	FFmpegPlugin.cpp
 	MuxerTable.cpp
 	CpuCapabilities.cpp
+	
+	gfx_conv_c.cpp
+	gfx_conv_c_lookup.cpp
+	gfx_conv_mmx.cpp
+	gfx_util.cpp
 	;
 
 
@@ -34,10 +39,6 @@ UseHeaders [ FDirName $(HAIKU_FFMPEG_HEADERS) libswscale ] ;
 Addon ffmpeg :
 	$(sources)
 
-	gfx_conv_c.cpp
-	gfx_conv_c_lookup.cpp
-	gfx_conv_mmx.cpp
- 	gfx_util.cpp
 	yuvrgb_sse.nasm
 	yuvrgb_sse2.nasm
 	yuvrgb_ssse3.nasm