Re-fix bug #3319 with less side effects.

ee97a5e7 · Roman Donchenko · f0220484 · ee97a5e7
Commit ee97a5e7 authored Jan 17, 2014 by Roman Donchenko
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copy.cpp modules/core/src/copy.cpp +1 -0

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--- a/modules/core/src/copy.cpp
+++ b/modules/core/src/copy.cpp
@@ -286,6 +286,7 @@ void Mat::copyTo( OutputArray _dst, InputArray _mask ) const

    if( dims <= 2 )
    {
+        CV_Assert( size() == mask.size() );
        Size sz = getContinuousSize(*this, dst, mask, mcn);
        copymask(data, step, mask.data, mask.step, dst.data, dst.step, sz, &esz);
        return;