Pré-release fixes (#688)

layouts/partials/blocks/templates/gallery.html

@@ -16,7 +16,7 @@
               "options" site.Params.blocks.gallery.carousel
               "partial" "blocks/templates/gallery/carousel-image.html"
           )}}
-        {{ else }}
+        {{ else if .images }}
           {{ partial "blocks/templates/gallery/images.html" . }}
         {{- end -}}
       </div>

layouts/partials/commons/image.html

@@ -24,7 +24,7 @@
     {{- if .crop -}}
       {{- $crop = true -}}
     {{- end -}}
-    {{ $image_class := .html_class }}
+    {{ $image_class := .html_class | default "" }}
     {{ $is_png := strings.HasSuffix $image.name "png" }}
     {{ $is_svg := strings.HasSuffix $image.name "svg" }}
     {{ if $is_png }}