installation fails when using -configuration switch

Hi,

I have one eclipse installation and use the -configuration switch to use that
with different sets of plugins. I installed objectteams from the update site,
and everything went well, except for the file config.ini, which now contains
wrong relative paths:

osgi.framework.extensions=reference\:file\:../../eclipse-configurations/3.5-
OT/plugins/org.objectteams.otequinox.hook_1.3.2.200909280002.jar,reference\:file\:../../eclipse-
configurations/3.5-
OT/plugins/org.objectteams.otequinox.runtime_1.3.2.200909280002.jar

The path is probably calculated from Platform.getInstallLocation(), but should
rather be calculated from Platform.getConfigurationLocation().

Cheers,
Carsten