Fix #202

Former-commit-id: 4bfdc41566b255452ba1179f98523f51200cafd2 [formerly 194853322977723818d2fcfe860d0fa54117f9dc] [formerly 512370c90e08f58f729ab1a9d03e00ab72b1da69 [formerly 0a11c52a89]]
Former-commit-id: 518476f3f715724ca9b4cfd65aa234006d3a3677 [formerly 7717d5bff8169c8ae5e31d3a70de35ffcd59cd72]
Former-commit-id: 0414a3e51602ea9d51257036c620cfe6853103b3

http.go

@@ -67,7 +67,7 @@ func serveHTTP(c *RequestContext, w http.ResponseWriter, r *http.Request) (int,
 		return c.StaticGen.Preview(c, w, r)
 	}
 
-	if strings.HasPrefix(r.URL.Path, "/share/") && c.StaticGen != nil {
+	if strings.HasPrefix(r.URL.Path, "/share/") {
 		r.URL.Path = strings.TrimPrefix(r.URL.Path, "/share/")
 		return sharePage(c, w, r)
 	}