[Halld-offline] nightly build errors and warnings

[Mark Ito]

================ ERRORS ================
================ WARNINGS ==============
MyProcessor.cc:236: warning: passing 'double' for argument 1 to 'virtual void TAttLine::SetLineWidth(Width_t)'
MyProcessor.cc:236: warning: passing 'double' for argument 1 to 'virtual void TAttLine::SetLineWidth(Width_t)'