clang: good catch...

Hi,

  here a nice catch made by clang in out code:

x.cxx:226:19: warning: expression result unused
if (ref||!TFile::Open("file.root"),"CACHEREAD") {

only clang found this, not a single other compiler are other static analyzers (and we use most compilers available in the world)!!

The correct code is:

if (ref||!TFile::Open("file.root","CACHEREAD")) {

Cheers, Fons.