fix DrivesTaskManager when a new partition comes and the mount point was

already associated to the same drive resource

Author: guillaume

net.lecousin.core/src/main/java/net/lecousin/framework/concurrent/DrivesTaskManager.java

@@ -190,17 +190,18 @@ private void newPartition(Pair<Object,File> driveAndPartition) {
 		synchronized (rootManagers) {
 			previous = rootManagers.get(path);
 			if (previous != null) {
-				Threading.unregisterResource(rootResources.get(path));
 				rootManagers.remove(path);
 				rootResources.remove(path);
 				rootManagers.put(path, tm);
-				rootResources.put(path, drive);
+				Object prevResource = rootResources.put(path, drive);
+				if (!rootResources.containsValue(prevResource))
+					Threading.unregisterResource(prevResource);
 			} else {
 				rootManagers.put(path, tm);
 				rootResources.put(path, drive);
 			}
 		}
-		if (previous != null)
+		if (previous != null && previous != tm)
 			previous.transferAndClose(tm);
 		Threading.logger.info("New partition added to DrivesTaskManager: " + mount.getAbsolutePath());
 	}