Don't touch the image if thumbnail is not present

1 files changed, 5 insertions, 2 deletions

diff --git a/jpeg-utils.cpp b/jpeg-utils.cpp
index be4908f..cb06abc 100644
--- a/jpeg-utils.cpp
+++ b/jpeg-utils.cpp
@@ -390,8 +390,11 @@ strip_thumbnail (const char *filename)
      image->readMetadata();
      Exiv2::ExifData &exifData = image->exifData();
      if (! exifData.empty())  {
-       exifData.eraseThumbnail();
-       image->writeMetadata();
+       std::string thumbExt = exifData.thumbnailExtension();
+       if (! thumbExt.empty()) {
+         exifData.eraseThumbnail();
+         image->writeMetadata();
+       }
      }
   }
   catch (Exiv2::AnyError& e)