Fixed Stock initialization with single number fill(number, size) to use dynamic Enume...

Fixed Stock initialization with single number fill(number, size) to use dynamic EnumerationName.size instead of getting the size from the number of indexes defined to enumeration. This way it works also with overridden enumerations (fixes #4073)

git-svn-id: https://www.simantics.org/svn/simantics/sysdyn/trunk@26786 ac1ea38d-2e2b-0410-8846-a27921b304fc