Fix crash when trying to read an invalid image

Helper::picSize assumed that all data passed to it is a valid image and
thus crashed with an exception. Wrap it into try - catch and return
QVariant() when the pic is invalid.

1 files changed, 7 insertions, 3 deletions

diff --git a/helper.cpp b/helper.cpp
index 32dc11c..9398a06 100644
--- a/helper.cpp
+++ b/helper.cpp
@@ -304,9 +304,13 @@ namespace Helper {
 
     QVariant picSize(const QString &path){
         Magick::Image img;
-        img.ping(qPrintable(path));
-        QString retval = QString("%1x%2").arg(QString::number(img.columns()), QString::number(img.rows()));
-        return retval;
+        try {
+            img.ping(qPrintable(path));
+            QString retval = QString("%1x%2").arg(QString::number(img.columns()), QString::number(img.rows()));
+            return retval;
+        } catch(...) {
+            return QVariant();
+        }
     }
 
     PicData convertArchivefileToPng(PicData data){