Fix: restore broken feature. File upload/delete was ko with linux and

windows.
Note also that strisplashes should never be used anywhere in the code,
because strislashes is nor a HTML escape, nor a javascrip escape, nor a
shell or PHP escape function. If stripslashes is used somewhere, this
means there is a bug somewhere else.

upload/delete using the standard feature (not fileupload) works
correctly with that on linux/windows.

htdocs/core/lib/files.lib.php

@@ -498,7 +498,7 @@ function dol_unescapefile($filename)
 	// Remove path information and dots around the filename, to prevent uploading
 	// into different directories or replacing hidden system files.
 	// Also remove control characters and spaces (\x00..\x20) around the filename:
-	return trim(basename(stripslashes($filename)), ".\x00..\x20");
+	return trim(basename($filename), ".\x00..\x20");
 }
 
 /**