pginstaller - pginst: New error handling - use MsgBox() instead of

Log Message:
-----------
New error handling - use MsgBox() instead of MessageBox(). Will make sure the messages always pop up on top of the
dialogand not behind it as sometimes happened before. Also, we can now use %m in any error messages, to give system
errorstrings. 

Modified Files:
--------------
    pginst/ca:
        pginstca.c (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/pginstca.c.diff?r1=1.14&r2=1.15)
        pginstca.h (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/pginstca.h.diff?r1=1.2&r2=1.3)
        sspi.c (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/sspi.c.diff?r1=1.1&r2=1.2)
        user.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pginstaller/pginst/ca/user.c.diff?r1=1.3&r2=1.4)