AssetRendition: Log detected dimension in WARN message when width/hei…

…ght could not be read from metadata (#35)

src/main/java/io/wcm/handler/mediasource/dam/AssetRendition.java

@@ -174,16 +174,17 @@ private static long getAssetMetadataValueAsLong(Asset asset, String... propertyN
       boolean suppressLogWarningNoRenditionsMetadata) {
     try (InputStream is = rendition.getStream()) {
       if (is != null) {
+        Layer layer = new Layer(is);
+        long width = layer.getWidth();
+        long height = layer.getHeight();
+        Dimension dimension = toDimension(width, height);
         if (!suppressLogWarningNoRenditionsMetadata) {
           log.warn("Unable to detect rendition metadata for {}, "
-              + "fallback to inefficient detection by loading image into in memory. "
+              + "fallback to inefficient detection by loading image into in memory (detected dimension={}). "
               + "Please check if the service user for the bundle 'io.wcm.handler.media' is configured properly.",
-              rendition.getPath());
+              rendition.getPath(), dimension);
         }
-        Layer layer = new Layer(is);
-        long width = layer.getWidth();
-        long height = layer.getHeight();
-        return toDimension(width, height);
+        return dimension;
       }
       else {
         log.warn("Unable to get binary stream for rendition {}", rendition.getPath());