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

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

Modified Files:
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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)