FELIX-1776: problem when using relative dirs

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@938115 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Scanner.java b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Scanner.java
index 54a5b87..8f5623d 100644
--- a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Scanner.java
+++ b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Scanner.java
@@ -20,6 +20,7 @@
 
 import java.io.File;
 import java.io.FilenameFilter;
+import java.io.IOException;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -107,7 +108,7 @@
         Set/*<File>*/ removed = new HashSet/*<File>*/(storedChecksums.keySet());
         for (int i = 0; i < list.length; i++)
         {
-            File file  = list[i];
+            File file  = canon(list[i]);
             long lastChecksum = lastChecksums.get(file) != null ? ((Long) lastChecksums.get(file)).longValue() : 0;
             long storedChecksum = storedChecksums.get(file) != null ? ((Long) storedChecksums.get(file)).longValue() : 0;
             long newChecksum = checksum(file);
@@ -132,6 +133,18 @@
         return files;
     }
 
+    private static File canon(File file)
+    {
+        try
+        {
+            return file.getCanonicalFile();
+        }
+        catch (IOException e)
+        {
+            return file;
+        }
+    }
+
     /**
      * Retrieve the previously computed checksum for a give file.
      *