Elevate "can't write hashes" message from debug to warning level

I never realized that my hashes weren't written, because it only
outputs a debug instead of a warning message.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 1 insertions, 1 deletions

diff --git a/core/qthelper.cpp b/core/qthelper.cpp
index d26d2eb4d..325c1bcd6 100644
--- a/core/qthelper.cpp
+++ b/core/qthelper.cpp
@@ -1108,7 +1108,7 @@ void write_hashes()
 		stream << thumbnailCache;
 		hashfile.commit();
 	} else {
-		qDebug() << "cannot open" << hashfile.fileName();
+		qWarning() << "Cannot open hashfile for writing: " << hashfile.fileName();
 	}
 }