#1243. Fixing compilation warnings from clang in jp2image.cpp

src/jp2image.cpp

@@ -598,12 +598,13 @@ namespace Exiv2
 
     } // Jp2Image::writeMetadata
 
+#   pragma clang diagnostic push
+#   pragma clang diagnostic ignored "-Wcast-align"
     void Jp2Image::encodeJp2Header(const DataBuf& boxBuf,DataBuf& outBuf)
     {
         DataBuf output(boxBuf.size_ + iccProfile_.size_ + 100); // allocate sufficient space
         int     outlen = sizeof(Jp2BoxHeader) ; // now many bytes have we written to output?
         int      inlen = sizeof(Jp2BoxHeader) ; // how many bytes have we read from boxBuf?
-
         Jp2BoxHeader* pBox   = (Jp2BoxHeader*) boxBuf.pData_;
         int32_t       length = getLong((byte*)&pBox->length, bigEndian);
         int32_t       count  = sizeof (Jp2BoxHeader);
@@ -667,6 +668,7 @@ namespace Exiv2
         ul2Data((byte*)&pBox->type,kJp2BoxTypeJp2Header,bigEndian);
         ul2Data((byte*)&pBox->length,outlen,bigEndian);
     } // Jp2Image::encodeJp2Header
+#   pragma clang diagnostic pop
 
     void Jp2Image::doWriteMetadata(BasicIo& outIo)
     {