Merge branch 't/clang'

diff --cc NEWS
index 57ef197,57ef197..c6c2e4d
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -6,6 -6,6 +6,7 @@@
          writers is now treated as a regular expression. This allows
          to replace 5 lines in the config file (one for each audio
          format) by one single line. See the manual for details.
++      - Compiles cleanly also with llvm/clang.
  
  --------------------------------------
  0.4.7 (2011-06-01) "infinite rollback"