From e18224110c44af42deff84cbaf4c7cf6c5664c58 Mon Sep 17 00:00:00 2001
From: Istvan Sarandi <sarandi@ubuntu.(none)>
Date: Thu, 17 Apr 2014 02:41:52 +0200
Subject: [PATCH] Removed emptiness check from cv::hconcat and cv::vconcat.
 Sometimes you want to concatenate with an empty matrix.

---
 modules/core/src/matrix.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index f7aded7312..6458145a61 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -2665,7 +2665,7 @@ void cv::hconcat(const Mat* src, size_t nsrc, OutputArray _dst)
     size_t i;
     for( i = 0; i < nsrc; i++ )
     {
-        CV_Assert( !src[i].empty() && src[i].dims <= 2 &&
+        CV_Assert( src[i].dims <= 2 &&
                    src[i].rows == src[0].rows &&
                    src[i].type() == src[0].type());
         totalCols += src[i].cols;
@@ -2705,7 +2705,7 @@ void cv::vconcat(const Mat* src, size_t nsrc, OutputArray _dst)
     size_t i;
     for( i = 0; i < nsrc; i++ )
     {
-        CV_Assert( !src[i].empty() && src[i].dims <= 2 &&
+        CV_Assert(src[i].dims <= 2 &&
                   src[i].cols == src[0].cols &&
                   src[i].type() == src[0].type());
         totalRows += src[i].rows;