Prevent null pointer access

Thanks to Ingo for fixing the segfault.
2020-09-28 22:17:49 -07:00
parent be858363a6
commit b8af429f0e
2 changed files with 4 additions and 2 deletions
--- a/rtengine/improccoordinator.cc
+++ b/rtengine/improccoordinator.cc
@@ -364,7 +364,7 @@ void ImProcCoordinator::updatePreviewImage(int todo, bool panningRelatedChange)
            }

            imgsrc->getRAWHistogram(histRedRaw, histGreenRaw, histBlueRaw);
-            hist_raw_dirty = !hListener->updateHistogramRaw();
+            hist_raw_dirty = !(hListener && hListener->updateHistogramRaw());

            highDetailPreprocessComputed = highDetailNeeded;