shtoolse,shtoolsf: Avoid empty input issues
shtoolse,shtoolsf: Avoid empty input issues

Change-Id: I15052010fbc82572a4a83dbfcdae4ea81f121320
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools