Update mysqlbu-scripts.sh

mysqlbu-scripts.sh

@@ -51,6 +51,12 @@ DELETE_BACKUP() {
 		tba=`expr $tba + 1`
 	done
 	
+	if ! exists $1 in $tbus; then
+		echo "Incorrect entry, please select again...";
+		sleep 5
+		DELETE_MENU
+	fi
+	
 	sbu1=${tbus[$1]}
 	thr=`echo ${sbu1//_BASE/} | sed 's/.*\///'`
 	bsz=`du -sh ${sbu1} | awk '{print $1}'`