Comment 2 for bug 537331

StacktraceTop:
 __mempcpy_ssse3_rep () from /lib/tls/i686/cmov/libc.so.6
 JBIG2Stream::close (this=0x66f9ba75) at JBIG2Stream.cc:1230
 JBIG2Bitmap::getSlice (this=0x2d902e0, x=1730813931,
 JBIG2Stream::readGenericRefinementRegionSeg (
 JBIG2Stream::readSegments (this=0x2cce368)