Merge branch 't/clang'

diff --cc NEWS
index 57ef197ba3e9dbba332ec208c43d90f48cfd5040,57ef197ba3e9dbba332ec208c43d90f48cfd5040..c6c2e4dbd741954bd344d5b240e7ba98851ff7e8
--- 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"