-x test similar as the others

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

bin/cdist-manifest-run

@@ -43,10 +43,7 @@ cdist-type-build-emulation || __cdist_exit_err "Failed to build type emulation b
 PATH="${__cdist_out_type_bin_dir}:$PATH"
 
 # Force -x, so the user is aware the file is executed
-if [ ! -x "${__cdist_manifest}" ]; then
-   __cdist_exit_err "${__cdist_manifest} needs to be executable."
-fi
-
+[ -x "${__cdist_manifest}" ] || __cdist_exit_err "${__cdist_manifest} needs to be executable."
 mkdir -p "${__cdist_output_dir}" || __cdist_exit_err "Cannot create output dir ${__cdist_output_dir}"
 cd "$__cdist_work_dir" || __cdist_exit_err "Cannot change to work dir \"$__cdist_work_dir\"."