disallow empty selections

workout.sh

@@ -270,7 +270,9 @@ machine?() {
   echo "${machinemenu}"
   numerate machines
   read -p "${selectprompt}" workingmachine
-  vieworlog?
+  if [ "${workingmachine}" ]; then
+    vieworlog?
+  fi
   echo "${repeatmachinemenu}"
   read -p "${selectprompt}" repeat
   if [ "${repeat}" = "y" ]; then
@@ -284,6 +286,9 @@ routines?() {
   echo "${routinemenu}"
   numerate routines
   read -p "${selectprompt}" workingroutine
+  if [ -z "${workingroutine}" ]; then
+    routines?
+  fi
 }
 
 main() {