tools/tiffcp.c:1047: error: Integer Overflow L2
  ([0, `imagewidth`] - 1):unsigned32.

tools/tiffcp.c:1018:1: <LHS trace>
1016.  * Contig -> separate by row.
1017.  */
1018. DECLAREcpFunc(cpContig2SeparateByRow)
      ^
1019. {
1020. 	tsize_t scanlinesizein = TIFFScanlineSize(in);

tools/tiffcp.c:1018:1: Parameter `imagewidth`
1016.  * Contig -> separate by row.
1017.  */
1018. DECLAREcpFunc(cpContig2SeparateByRow)
      ^
1019. {
1020. 	tsize_t scanlinesizein = TIFFScanlineSize(in);

tools/tiffcp.c:1047:9: Assignment
1045. 			inp = ((uint8*)inbuf) + s;
1046. 			outp = (uint8*)outbuf;
1047. 			for (n = imagewidth; n-- > 0;) {
              ^
1048. 				*outp++ = *inp;
1049. 				inp += spp;

tools/tiffcp.c:1047:25: Binary operation: ([0, imagewidth] - 1):unsigned32
1045. 			inp = ((uint8*)inbuf) + s;
1046. 			outp = (uint8*)outbuf;
1047. 			for (n = imagewidth; n-- > 0;) {
                              ^
1048. 				*outp++ = *inp;
1049. 				inp += spp;
