Minor tweaks to the SELECT function:

Minor tweaks to the SELECT function:

1. Narrowed the scope of the idlClass variable.

2. Made cname const,

3. In the loop for building the column list: eliminated an IDL lookup
for the class name, because we already have it.  The IDL stores it
redundantly in two different places, and we don't need to find both.

4. Renamed __column and __alias to _column and _alias.  Identifiers
beginning with two underscores are reserved.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@12053 dcc99617-32d9-48b4-a31d-7c20da2025e4