Silence exiftool's stderr

In the past, this might have been useful, but now,
exiftool works on pretty much every file passed to it by MAT.

Also, if something goes wrong, MAT will know about this thanks to the
return code != 0.

1 files changed, 1 insertions, 1 deletions

diff --git a/libmat/exiftool.py b/libmat/exiftool.py
index ef81ed3..78550ed 100644
--- a/libmat/exiftool.py
+++ b/libmat/exiftool.py
@@ -31,7 +31,7 @@ class ExiftoolStripper(parser.GenericParser):
             # Also, '-CommonIFD0' is needed for .tiff files
             subprocess.call(['exiftool', '-all=', '-adobe=', '-exif:all=', '-Time:All=', '-m',
                              '-CommonIFD0=', '-overwrite_original', self.filename],
-                            stdout=open('/dev/null'))
+                            stdout=open('/dev/null'), stderr=open('/dev/null'))
             return True
         except OSError:
             return False