Catch Magick::Exception

Prevent crash when trying to convert a file to png. This was a hard one.
After checking into detached QT-Containers I finally realized that
convertArchivefileToPng was the culprit, because ImageMagick::read
exited with an "Unsupported marker type 0x09" execption.

After some more investigation with convert, or magick convert these
days, I found out that they could be ignored. Yes, it's a big hammer,
but if it still fails after trying to convert, just return if still
don't have a valid image.

1 files changed, 4 insertions, 0 deletions

diff --git a/pictureviewer2.cpp b/pictureviewer2.cpp
index e56f52a..1e49bdf 100644
--- a/pictureviewer2.cpp
+++ b/pictureviewer2.cpp
@@ -449,6 +449,10 @@ void PictureViewer2::showFile(const PicData &file){
     if(pixmap.isNull()){
         if(fi.canonicalFilePath().startsWith(mArchiveDir)){
             mCurPicData = Helper::convertArchivefileToPng(file);
+            if(mCurPicData.isEmpty()){
+                //convert failed even though ignoring errors
+                return;
+            }
             mFiles[mCurPos] = mCurPicData;
             if(!mCurPicData.isEmpty()){
                 pixmap = QPixmap(mCurPicData.at(3).toString());