tools/tiff2pdf.c:1934: error: Null Dereference
  pointer `sbc` last assigned on line 1922 could be null and is dereferenced at line 1934, column 17.

tools/tiff2pdf.c:1920:1: start of procedure t2p_read_tiff_size()
1918. */
1919. 
1920. void t2p_read_tiff_size(T2P* t2p, TIFF* input){
      ^
1921. 
1922. 	uint64* sbc=NULL;

tools/tiff2pdf.c:1922:2: 
1920. void t2p_read_tiff_size(T2P* t2p, TIFF* input){
1921. 
1922. 	uint64* sbc=NULL;
       ^
1923. #if defined(JPEG_SUPPORT) || defined (OJPEG_SUPPORT)
1924. 	unsigned char* jpt=NULL;

tools/tiff2pdf.c:1924:2: 
1922. 	uint64* sbc=NULL;
1923. #if defined(JPEG_SUPPORT) || defined (OJPEG_SUPPORT)
1924. 	unsigned char* jpt=NULL;
       ^
1925. 	tstrip_t i=0;
1926. 	tstrip_t stripcount=0;

tools/tiff2pdf.c:1925:2: 
1923. #if defined(JPEG_SUPPORT) || defined (OJPEG_SUPPORT)
1924. 	unsigned char* jpt=NULL;
1925. 	tstrip_t i=0;
       ^
1926. 	tstrip_t stripcount=0;
1927. #endif

tools/tiff2pdf.c:1926:2: 
1924. 	unsigned char* jpt=NULL;
1925. 	tstrip_t i=0;
1926. 	tstrip_t stripcount=0;
       ^
1927. #endif
1928.         uint64 k = 0;

tools/tiff2pdf.c:1928:9: 
1926. 	tstrip_t stripcount=0;
1927. #endif
1928.         uint64 k = 0;
              ^
1929. 
1930. 	if(t2p->pdf_transcode == T2P_TRANSCODE_RAW){

tools/tiff2pdf.c:1930:5: Taking true branch
1928.         uint64 k = 0;
1929. 
1930. 	if(t2p->pdf_transcode == T2P_TRANSCODE_RAW){
          ^
1931. #ifdef CCITT_SUPPORT
1932. 		if(t2p->pdf_compression == T2P_COMPRESS_G4 ){

tools/tiff2pdf.c:1932:6: Taking true branch
1930. 	if(t2p->pdf_transcode == T2P_TRANSCODE_RAW){
1931. #ifdef CCITT_SUPPORT
1932. 		if(t2p->pdf_compression == T2P_COMPRESS_G4 ){
           ^
1933. 			TIFFGetField(input, TIFFTAG_STRIPBYTECOUNTS, &sbc);
1934.             if (sbc[0] != (uint64)(tmsize_t)sbc[0]) {

tools/tiff2pdf.c:1933:4: 
1931. #ifdef CCITT_SUPPORT
1932. 		if(t2p->pdf_compression == T2P_COMPRESS_G4 ){
1933. 			TIFFGetField(input, TIFFTAG_STRIPBYTECOUNTS, &sbc);
         ^
1934.             if (sbc[0] != (uint64)(tmsize_t)sbc[0]) {
1935.                 TIFFError(TIFF2PDF_MODULE, "Integer overflow");

libtiff/tif_dir.c:1214:1: start of procedure TIFFGetField()
  1212.  * internal directory structure.
  1213.  */
  1214. int
        ^
  1215. TIFFGetField(TIFF* tif, uint32 tag, ...)
  1216. {

libtiff/tif_dir.c:1220:2: 
  1218. 	va_list ap;
  1219. 
  1220. 	va_start(ap, tag);
         ^
  1221. 	status = TIFFVGetField(tif, tag, ap);
  1222. 	va_end(ap);

libtiff/tif_dir.c:1221:2: Skipping TIFFVGetField(): empty list of specs
  1219. 
  1220. 	va_start(ap, tag);
  1221. 	status = TIFFVGetField(tif, tag, ap);
         ^
  1222. 	va_end(ap);
  1223. 	return (status);

libtiff/tif_dir.c:1222:2: 
  1220. 	va_start(ap, tag);
  1221. 	status = TIFFVGetField(tif, tag, ap);
  1222. 	va_end(ap);
         ^
  1223. 	return (status);
  1224. }

libtiff/tif_dir.c:1223:2: 
  1221. 	status = TIFFVGetField(tif, tag, ap);
  1222. 	va_end(ap);
  1223. 	return (status);
         ^
  1224. }
  1225. 

libtiff/tif_dir.c:1224:1: return from a call to TIFFGetField
  1222. 	va_end(ap);
  1223. 	return (status);
  1224. }
        ^
  1225. 
  1226. /*

tools/tiff2pdf.c:1934:17: 
1932. 		if(t2p->pdf_compression == T2P_COMPRESS_G4 ){
1933. 			TIFFGetField(input, TIFFTAG_STRIPBYTECOUNTS, &sbc);
1934.             if (sbc[0] != (uint64)(tmsize_t)sbc[0]) {
                      ^
1935.                 TIFFError(TIFF2PDF_MODULE, "Integer overflow");
1936.                 t2p->t2p_error = T2P_ERR_ERROR;
