RXS_libLEExists()

Used to check the existence of a library entry in the library list before using RXS_addLibLE() to add one.

Subprocedure Prototype

`D RXS_libLEExists... D pr 3 0`	Returns '0' if the library is not in the library list, otherwise returns its position.
`D pLib 10a value`	Required The name of the target library.
`D pLibType 10a value options(*nopass)`	Default Value: `*USER`