Remove an unnecessary condition that I added hastily: Unsigned numbers are obviously...

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.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194206 91177308-0d34-0410-b5e6-96231b3b80d8