The extension ext should begin with a leading dot, as in ".html"

git-svn-id: https://weed-fs.googlecode.com/svn/trunk@58 282b0af5-e82d-9cf1-ede4-77906d7719d0

weed-fs/src/cmd/weedvolume/weedvolume.go

@@ -143,7 +143,7 @@ func parseURLPath(path string) (vid, fid, ext string) {
 	ext = ""
 	if dotIndex > 0 {
 		fid = path[commaIndex+1 : dotIndex]
-		ext = path[dotIndex+1:]
+		ext = path[dotIndex:]
 	}
 	return
 }