added snapshot filename to the link

- changed cgit_pageurl into cgit_fileurl with the filename parameter
 - rewritten cgit_pageurl as a wrapper around cgit_fileurl

Signed-off-by: Michael Krelin <hacker@klever.net>

ui-snapshot.c

@@ -109,7 +109,7 @@ void cgit_print_snapshot_links(const char *repo,const char *hex)
 		const struct snapshot_archive_t* sat = &snapshot_archives[f];
 		filename = fmt("%s-%s%s",repo,hex,sat->suffix);
 		htmlf("<a href='%s'>%s</a><br/>",
-			cgit_pageurl(repo,"snapshot",
+			cgit_fileurl(repo,"snapshot",filename,
 			    fmt("id=%s&amp;name=%s",hex,filename)), filename);
 	}
 }