Don't crash if we feed a non-picture to NewPicsDialog

Actually use valid. Return when we get something else than an image.
Otherwise we'd crash in ImageMagick::ping.

1 files changed, 3 insertions, 0 deletions

diff --git a/newpicsdialog.cpp b/newpicsdialog.cpp
index a86c566..b1b5842 100644
--- a/newpicsdialog.cpp
+++ b/newpicsdialog.cpp
@@ -338,6 +338,9 @@ void NewPicFilesModel::addFile(const QString &path){
     if(haveMd5(md5)){
         valid = false;
     }
+    if(!valid){
+        return;
+    }
     QVariant picSize = Helper::picSize(fi.absoluteFilePath());
     insertRows(0, 1, QModelIndex());
     QModelIndex inserted = index(0, 1, QModelIndex());