Mention damaged input testing.

Originally committed as revision 11460 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/general.texi

@@ -926,6 +926,11 @@ do not attach several unrelated patches to the same mail.
     improves readability.
 @item
     Did you provide a suggestion for a clear commit log message?
+@item
+    Did you test your decoder or demuxer against damaged data? If no, see
+    tools/trasher and the noise bitstream filter. Your decoder or demuxer
+    should not crash or end in a (near) infinite loop when feeded with
+    damaged data.
 @end enumerate
 
 @section Patch review process