Add an entry for the sws_isSupportedInput() and

sws_isSupportedOutput() functions addition.

Originally committed as revision 21066 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/APIchanges

@@ -12,6 +12,9 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2010-01-07 - r30236 - lsws 0.8.0 - sws_isSupported{In,Out}put
+  Add sws_isSupportedInput and sws_isSupportedOutput() functions.
+
 2010-01-06 - r21035 - lavfi 1.14.0 - avfilter_add_colorspace()
   Change the avfilter_add_colorspace() signature, make it accept an
   (AVFilterFormats **) rather than an (AVFilterFormats *) as before.