fixed condition

layouts/partials/papers/document-nav.html

@@ -15,7 +15,7 @@
                       "tablet"   "208x247"
                       "desktop"  "408x485"
                     ) -}}
-            {{- else if site.Params.default_image.url -}}
+            {{- else -}}
               {{- partial "commons/image-default.html" "papers" -}}
             {{- end -}}
           </div>

layouts/partials/papers/sidebar.html

@@ -17,7 +17,7 @@
                           "tablet"   "208x247"
                           "desktop"  "408x485"
                         ) -}}
-                {{- else if site.Params.default_image.url -}}
+                {{- else -}}
                   {{- partial "commons/image-default.html" "papers" -}}
                 {{- end -}}
               </div>