Remove an unnecessary condition that I added hastily: Unsigned numbers are obviously >= 0 ;)

Also - others have complained about some white space issues - sorry about that - continues to be a pain point for me - will try and see what I can do with clang-format this evening after work - as a short term fix, if anyone can email me the files that they have already identified with issues, it would help me speed up a focused fix. sorry.

llvm-svn: 194206