typo

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@26212 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale.c

@@ -38,7 +38,7 @@
 */
 
 /*
-tested special converters (most are tested actually but i didnt write it down ...)
+tested special converters (most are tested actually, but i did not write it down ...)
  YV12 -> BGR16
  YV12 -> YV12
  BGR15 -> BGR16