Fix build on older gcc

database.cpp

@@ -299,7 +299,7 @@ bool Database::indexFile(const QFileInfo &file)
         }
 
         QVariantList file_id, keys, values, comments;
-        for(auto &record : info.fitsHeader)
+        for(const auto &record : info.fitsHeader)
         {
             file_id << last_id;
             keys << QString(record.key);

imageinfo.h

@@ -4,6 +4,7 @@
 #include <QTreeWidget>
 #include <wcslib/wcs.h>
 #include <cmath>
+#include <memory>
 
 namespace pcl { class FITSHeaderKeyword; }
 
@@ -13,6 +14,7 @@ struct FITSRecord
     QVariant value;
     QByteArray comment;
     bool editable() const;
+    FITSRecord(){}
     FITSRecord(const QByteArray &key, const QVariant &value, const QByteArray &comment);
     FITSRecord(const pcl::FITSHeaderKeyword &record);
     QByteArray valueToByteArray() const;