Don't raise when expanding ORIGINAL_PATHS
Don't raise when expanding ORIGINAL_PATHS

File.expand_path raises ArgumentError when it is passed a path with a
nonexistent username, e.g.:

  $ PATH=~foo/bin:$PATH brew
  /usr/local/Library/Homebrew/global.rb:97:in `expand_path': user foo
  doesn't exist (ArgumentError)

However, `brew doctor` does its own expansion of PATH entries and
outputs warnings if this happens, so let's just ignore it here and
continue on our way.

Signed-off-by: Jack Nagel <43386ce32af96f5c56f2a88e458cb94cebee3751@gmail.com>

palxex/brew,staticfloat/brew,claui/brew,tonyg/homebrew,reitermarkus/brew,tonyg/homebrew,aw1621107/brew,mistydemeo/homebrew,alyssais/brew,sjackman/homebrew,tonyg/homebrew,nandub/brew,AnastasiaSulyagina/brew,DomT4/brew,EricFromCanada/brew,claui/brew,Homebrew/brew,DomT4/brew,palxex/brew,konqui/brew,toonetown/homebrew,reitermarkus/brew,aw1621107/brew,zmwangx/brew,konqui/brew,mgrimes/brew,JCount/brew,aw1621107/brew,Homebrew/brew,amar-laksh/brew_sudo,mahori/brew,zmwangx/brew,AnastasiaSulyagina/brew,ilovezfs/brew,mgrimes/brew,gordonmcshane/homebrew,rwhogg/brew,nandub/brew,mahori/brew,konqui/brew,MikeMcQuaid/brew,bfontaine/brew,reitermarkus/brew,staticfloat/brew,alyssais/brew,sjackman/homebrew,sjackman/homebrew,pseudocody/brew,muellermartin/dist,claui/brew,vitorgalvao/brew,vitorgalvao/brew,nandub/brew,vitorgalvao/brew,JCount/brew,bfontaine/brew,hanxue/linuxbrew,MikeMcQuaid/brew,Linuxbrew/brew,reelsense/brew,jmsundar/brew,MikeMcQuaid/brew,reitermarkus/brew,gordonmcshane/homebrew,DomT4/brew,staticfloat/brew,Homebrew/brew,bfontaine/brew,jmsundar/brew,mistydemeo/homebrew,gordonmcshane/homebrew,mahori/brew,sjackman/homebrew,maxim-belkin/brew,amar-laksh/brew_sudo,Linuxbrew/brew,ilovezfs/brew,maxim-belkin/brew,rwhogg/brew,JCount/brew,maxim-belkin/brew,rwhogg/brew,amar-laksh/brew_sudo,toonetown/homebrew,Homebrew/brew,Linuxbrew/brew,JCount/brew,gregory-nisbet/brew,mgrimes/brew,EricFromCanada/brew,jmsundar/brew,zmwangx/brew,vitorgalvao/brew,pseudocody/brew,AnastasiaSulyagina/brew,muellermartin/dist,mistydemeo/homebrew,Linuxbrew/brew,palxex/brew,nandub/brew,hanxue/linuxbrew,claui/brew,mahori/brew,EricFromCanada/brew,reelsense/brew,ilovezfs/brew,gregory-nisbet/brew,hanxue/linuxbrew,toonetown/homebrew,gregory-nisbet/brew,pseudocody/brew,EricFromCanada/brew,konqui/brew,MikeMcQuaid/brew,reelsense/brew,muellermartin/dist,DomT4/brew,alyssais/brew