pgtcl - libpgtcl: * pg_select was not checking returns from

Log Message:
-----------
* pg_select was not checking returns from Tcl_ObjSetVar2 and friends.
  The problem was that if the pg_select array already existed as a
  scalar variable, no error was returned to denote this, and it caused
  a coredump in Tcl 8.5.  This has now been fixed.

Modified Files:
--------------
    libpgtcl:
        ChangeLog (r1.58 -> r1.59)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/ChangeLog?r1=1.58&r2=1.59)
        configure (r1.17 -> r1.18)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/configure?r1=1.17&r2=1.18)
    libpgtcl/generic:
        pgtclCmds.c (r1.74 -> r1.75)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgtcl/libpgtcl/generic/pgtclCmds.c?r1=1.74&r2=1.75)