FRV: Handle if branches with nil return value
FRV: Handle if branches with nil return value

jeffyip/brakeman,liqites/brakeman,lee-leon/brakeman,htdc/brakeman,bf4/brakeman,spcoder/brakeman,jlecour/brakeman,lee-leon/brakeman,jakeatwork/brakeman,masarakki/brakeman,codeclimate/brakeman-deprecated,bf4/brakeman,masarakki/brakeman,github/brakeman,dfens/brakeman,bf4/brakeman,jakeatwork/brakeman,oreoshake/brakeman,cheerfulstoic/brakeman,oreoshake/brakeman,htdc/brakeman,masarakki/brakeman,liqites/brakeman,lee-leon/brakeman,liqites/brakeman,spcoder/brakeman,cheerfulstoic/brakeman,kbrock/brakeman,kbrock/brakeman,kbrock/brakeman,dfens/brakeman,cheerfulstoic/brakeman,jlecour/brakeman,jlecour/brakeman,spcoder/brakeman,jakeatwork/brakeman,jeffyip/brakeman,github/brakeman,codeclimate/brakeman-deprecated,htdc/brakeman,dfens/brakeman