From: Richard Kreckel <kreckel@ginac.de>
Date: Fri, 6 Nov 2015 14:04:49 +0000 (+0100)
Subject: Fix little missed optimization.
X-Git-Tag: ginac_1-6-6~9
X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=commitdiff_plain;h=aa722555bcb6f44365d1b653c720a91f8c7225e4

Fix little missed optimization.
---

diff --git a/ginac/power.cpp b/ginac/power.cpp
index 28e5bd3a..7298d569 100644
--- a/ginac/power.cpp
+++ b/ginac/power.cpp
@@ -1097,7 +1097,7 @@ public:
  *  where n = p1+p2+...+pk, i.e. p is a partition of n.
  */
 const numeric
-multinomial_coefficient(const std::vector<int> p)
+multinomial_coefficient(const std::vector<int> & p)
 {
 	numeric n = 0, d = 1;
 	std::vector<int>::const_iterator it = p.begin(), itend = p.end();