Fix image classname

Author: htuscher

Resources/Private/Templates/NodeTypes/Partials/SimpleImage.html

@@ -32,7 +32,7 @@
     <media:image image="{image}"
                  alt="{alternativeText}"
                  title="{title}"
-                 class="{f:if(condition: imageClassName, then: '', else: '{imageClassName}')}"
+                 class="{f:if(condition: imageClassName, then: '{imageClassName}', else: '')}"
                  width="{width}"
                  height="{height}"
                  maximumWidth="{maximumWidth}"