From 352a5e3981559bda2473190c182cf9dda3305926 Mon Sep 17 00:00:00 2001
From: ser1zw <azariahsawtikes@gmail.com>
Date: Sun, 28 Oct 2012 12:50:53 +0900
Subject: [PATCH] fix a bug of CvSeq#push

CvSeq<Fixnum>#push stores always 0 to sequences in some environments.

  seq = CvSeq.new(Fixnum)
  seq.push(10, 20, 30)
  seq.to_a #=> [10, 20, 30] expected, but [0, 0, 0] returned

This commit fixes the problem.
---
 ext/opencv/cvseq.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ext/opencv/cvseq.cpp b/ext/opencv/cvseq.cpp
index 28fcdc4..11865a3 100644
--- a/ext/opencv/cvseq.cpp
+++ b/ext/opencv/cvseq.cpp
@@ -332,13 +332,13 @@ rb_seq_push(VALUE self, VALUE args, int flag)
 {
   CvSeq *seq = CVSEQ(self);
   VALUE klass = seqblock_class(seq), object;
-  void *elem = NULL;
+  volatile void *elem = NULL;
   int len = RARRAY_LEN(args);
   for (int i = 0; i < len; ++i) {
     object = RARRAY_PTR(args)[i];
     if (CLASS_OF(object) == klass) {
       if (TYPE(object) == T_FIXNUM) {
-	int int_elem = FIX2INT(object);
+	volatile int int_elem = FIX2INT(object);
 	elem = &int_elem;
       }
       else {
@@ -346,9 +346,9 @@ rb_seq_push(VALUE self, VALUE args, int flag)
       }
       try {
 	if (flag == CV_FRONT)
-	  cvSeqPushFront(seq, elem);
+	  cvSeqPushFront(seq, (const void*)elem);
 	else
-	  cvSeqPush(seq, elem);
+	  cvSeqPush(seq, (const void*)elem);
       }
       catch (cv::Exception& e) {
 	raise_cverror(e);