Bug 563050 - No java debug sources due to NPE when accessing IResource.getLocation() on non standard FileSystem - getLocation() occasionally returns null for non local filesystems or in presence of yet not resolved variables. Change-Id: I8949d77f7d0e380b0532a3ce467c4937143214a5 Signed-off-by: Reguel Wermelinger <reguel.wermelinger@ivyteam.ch>