gst/videofilter/gstvideobalance.c: Fix regression; changing a property affects the video stream.
gst/videofilter/gstvideobalance.c: Fix regression; changing a property affects the video stream.

Original commit message from CVS:
* gst/videofilter/gstvideobalance.c: Fix regression; changing a
property affects the video stream.
* sys/xvimage/xvimagesink.c:
* sys/xvimage/xvimagesink.h:
Add synchronous property for debugging.  Should probably be
disabled in non-CVS builds.  Make sure that the Xv attribute
exists before we set it (crash!).  Fix a silly float bug that
caused colorbalance to just not work.

Distrotech/gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,alessandrod/gst-plugins-ugly,matsu/gst-plugins-ugly,StreamUtils/gst-plugins-ugly,jar1karp/gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,prajnashi/gst-plugins-ugly,shelsonjava/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,shelsonjava/gst-plugins-ugly,Distrotech/gst-plugins-ugly,surround-io/gst-plugins-ugly,Lachann/gst-plugins-ugly,jar1karp/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,Distrotech/gst-plugins-ugly,ahmedammar/platform_external_gst_plugins_ugly,surround-io/gst-plugins-ugly,collects/gst-plugins-ugly,GStreamer/gst-plugins-ugly,knuesel/gst-plugins-ugly,reynaldo-samsung/gst-plugins-ugly,collects/gst-plugins-ugly,krieger-od/gst-plugins-ugly,GStreamer/gst-plugins-ugly,ylatuya/gst-plugins-ugly,knuesel/gst-plugins-ugly,Distrotech/gst-plugins-ugly,collects/gst-plugins-ugly,Lachann/gst-plugins-ugly,krieger-od/gst-plugins-ugly,shelsonjava/gst-plugins-ugly,jar1karp/gst-plugins-ugly,fluendo/gst-plugins-ugly,jahrome/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,fluendo/gst-plugins-ugly,krieger-od/gst-plugins-ugly,matsu/gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,ahmedammar/platform_external_gst_plugins_ugly,collects/gst-plugins-ugly,alessandrod/gst-plugins-ugly,sebras/gst-plugins-ugly,alessandrod/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer-sdk__gst-plugins-ugly,GStreamer/gst-plugins-ugly,StreamUtils/gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,sebras/gst-plugins-ugly,surround-io/gst-plugins-ugly,jahrome/gst-plugins-ugly,Kurento/gst-plugins-ugly,StreamUtils/gst-plugins-ugly,prajnashi/gst-plugins-ugly,cablelabs/gst-plugins-ugly,jpakkane/gstreamer-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,cablelabs/gst-plugins-ugly,freedesktop-unofficial-mirror/gstreamer__gst-plugins-ugly,knuesel/gst-plugins-ugly,ahmedammar/platform_external_gst_plugins_ugly,jpakkane/gstreamer-plugins-ugly,Kurento/gst-plugins-ugly,fluendo/gst-plugins-ugly,Kurento/gst-plugins-ugly,PPCDroid/external-gst-plugins-ugly,jahrome/gst-plugins-ugly,matsu/gst-plugins-ugly,Distrotech/gst-plugins-ugly,Lachann/gst-plugins-ugly,jpakkane/gstreamer-plugins-ugly,cablelabs/gst-plugins-ugly,sebras/gst-plugins-ugly,matsu/gst-plugins-ugly,ylatuya/gst-plugins-ugly,prajnashi/gst-plugins-ugly,ylatuya/gst-plugins-ugly,GrokImageCompression/gst-plugins-ugly,krieger-od/gst-plugins-ugly