fboot: Avoid using an input that does not exist
fboot: Avoid using an input that does not exist

Change-Id: Id0edce820fa38d9fdb26396ca8e094c129f3b328
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools