imgcodecs(sunras): avoid undefined shift

backporting of commit: f2803aba

imgcodecs(sunras): avoid undefined shift
backporting of commit: f2803aba
c4ec46c1 · Alexander Alekhin · Alexander Alekhin · 69ff7a76 · c4ec46c1
Commit c4ec46c1 authored Mar 31, 2019 by Alexander Alekhin Committed by Alexander Alekhin Apr 02, 2019
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grfmt_sunras.cpp modules/imgcodecs/src/grfmt_sunras.cpp +1 -1

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--- a/modules/imgcodecs/src/grfmt_sunras.cpp
+++ b/modules/imgcodecs/src/grfmt_sunras.cpp
@@ -90,7 +90,7 @@ bool  SunRasterDecoder::readHeader()
        m_width  = m_strm.getDWord();
        m_height = m_strm.getDWord();
        m_bpp    = m_strm.getDWord();
-        int palSize = 3*(1 << m_bpp);
+        int palSize = (m_bpp > 0 && m_bpp <= 8) ? (3*(1 << m_bpp)) : 0;

        m_strm.skip( 4 );
        m_encoding = (SunRasType)m_strm.getDWord();