fix memcpy bytes size

bigtiff/parse.cpp

@@ -300,7 +300,7 @@ void printIFD(Exiv2::BasicIo& io, std::ostream& out, Exiv2::PrintStructureOption
                                         : is8ByteType(type)  ? 8
                                         : 1;
 
-            Exiv2::DataBuf  buf(size*count + pad);  // allocate a buffer
+            Exiv2::DataBuf buf(size * count + pad);
 
             // big data? Use 'data' as pointer to real data
             if ( count*size > 8 )                      // read into buffer
@@ -311,7 +311,7 @@ void printIFD(Exiv2::BasicIo& io, std::ostream& out, Exiv2::PrintStructureOption
                 io.seek(restore, Exiv2::BasicIo::beg); // restore
             }
             else  // use 'data' as data :)
-                std::memcpy(buf.pData_, &data, 8);     // copy data
+                std::memcpy(buf.pData_, &data, count * size);     // copy data
 
             if ( bPrint )
             {