BUG:404521 Check if animation config exists before accessing it's contents.

This fixes a bug where exporting exr frames caused a crash.

plugins/extensions/animationrenderer/AnimationRenderer.cpp

@@ -104,17 +104,19 @@ void AnimaterionRenderer::slotRenderAnimation()
          * Check if the dimensions make sense before we even try to batch save.
          */
         KisPropertiesConfigurationSP encoderConfig = dlgAnimationRenderer.getEncoderConfiguration();
-        if ((image->height()%2 || image->width()%2)
-                && (encoderConfig->getString("mimetype") == "video/mp4" ||
-                    encoderConfig->getString("mimetype") == "video/x-matroska")) {
-            QString m = "Mastroska (.mkv)";
-            if (encoderConfig->getString("mimetype")== "video/mp4") {
-                m = "Mpeg4 (.mp4)";
+        if (encoderConfig) {
+            if ((image->height()%2 || image->width()%2)
+                    && (encoderConfig->getString("mimetype") == "video/mp4" ||
+                        encoderConfig->getString("mimetype") == "video/x-matroska")) {
+                QString m = "Mastroska (.mkv)";
+                if (encoderConfig->getString("mimetype")== "video/mp4") {
+                    m = "Mpeg4 (.mp4)";
+                }
+                qWarning() << m <<"requires width and height to be even, resize and try again!";
+                doc->setErrorMessage(i18n("%1 requires width and height to be even numbers.  Please resize or crop the image before exporting.", m));
+                QMessageBox::critical(0, i18nc("@title:window", "Krita"), i18n("Could not render animation:\n%1", doc->errorMessage()));
+                return;
             }
-            qWarning() << m <<"requires width and height to be even, resize and try again!";
-            doc->setErrorMessage(i18n("%1 requires width and height to be even numbers.  Please resize or crop the image before exporting.", m));
-            QMessageBox::critical(0, i18nc("@title:window", "Krita"), i18n("Could not render animation:\n%1", doc->errorMessage()));
-            return;
         }
 
         const bool batchMode = false; // TODO: fetch correctly!