mac-virtualcam: Don't convert color space when converting color format

Converting the color space was likely accidental as it isn't explicitly
set. Unfortunately, not setting it means that it gets set to the
default, which is Rec. 709 and thus a conversion takes place when having
any other space. This conversion leads to a massive performance penalty
that isn't necessary.

plugins/mac-virtualcam/src/obs-plugin/plugin-main.mm

@@ -178,6 +178,8 @@ static bool virtualcam_output_start(void *data)
 		conversion.format = VIDEO_FORMAT_NV12;
 		conversion.width = vcam->videoInfo.output_width;
 		conversion.height = vcam->videoInfo.output_height;
+		conversion.colorspace = vcam->videoInfo.colorspace;
+		conversion.range = vcam->videoInfo.range;
 		obs_output_set_video_conversion(vcam->output, &conversion);
 
 		video_format = convert_video_format_to_mac(conversion.format);