make commit ID links in gotweb's blame page point to diffs rather than blobs
diff --git a/gotweb/gotweb_ui.h b/gotweb/gotweb_ui.h
index de5ce6d..ed77095 100644
--- a/gotweb/gotweb_ui.h
+++ b/gotweb/gotweb_ui.h
@@ -227,7 +227,7 @@ char *blame_line =
"<div id='blame_wrapper'>" \
"<div id='blame_number'>%.*d</div>" \
"<div id='blame_hash'>" \
- "<a href='?path=%s&action=blob&commit=%s&file=%s&folder=%s'>%.8s</a>" \
+ "<a href='?path=%s&action=diff&commit=%s&file=%s&folder=%s'>%.8s</a>" \
"</div>" \
"<div id='blame_date'>%s</div>" \
"<div id='blame_author'>%-8s</div>" \