foamCloneCase: corrected operation with no time dirs

bin/foamCloneCase

@@ -62,6 +62,7 @@ error() {
 }
 
 cpIfPresent() {
+    echo $1
     [ -e "$1" ] && echo "... ${1##*/}" && cp -r "$1" "$2"
 }
 
@@ -143,6 +144,7 @@ cpIfPresent "$srcDir/system" "$tgtDir"
 cpIfPresent "$srcDir/constant" "$tgtDir"
 
 time_dir="$(foamListTimes -withZero -case "$srcDir" | $time_option)"
+[ -n "${time_dir}" ] && \
 cpIfPresent "$srcDir/${time_dir}" "$tgtDir"
 
 [ "${time_dir}" = "0" -o -z "${time_dir}" ] && [ -z "$no_orig" ] && \