Remove warnings for `CLLastPreprocessing` and `CLMacroInstantiation` cursors (#251)
Remove warnings for `CLLastPreprocessing` and `CLMacroInstantiation` cursors (#251)

It looks like many new users are confused by those warnings. Since almost all of them can be safely ignored, I think it's better to print them as debug info.
ihnorton/Clang.jl,ihnorton/Clang.jl