Experimental fix TIFF files reading with one big stripe

[drons]

This is continuation of pull request #90
I'm not 100% feel certain in this changeset, but it fix problem with one stripe TIFF files.

[rouault]

Could you post the output of tiffdump on the tiff file you're trying to make recognized ?

[drons]

1.tif:
Magic: 0x4949 <little-endian> Version: 0x2a <ClassicTIFF>
Directory 0: offset 88 (0x58) next 0 (0)
ImageWidth (256) LONG (4) 1<3104>
ImageLength (257) LONG (4) 1<2430>
BitsPerSample (258) SHORT (3) 1<16>
Compression (259) SHORT (3) 1<1>
Photometric (262) SHORT (3) 1<1>
PlanarConfig (284) SHORT (3) 1<1>
StripOffsets (273) LONG (4) 1<202>
MinSampleValue (280) SHORT (3) 1<0>
MaxSampleValue (281) SHORT (3) 1<1023>

[drons]

Yesterday i'm run git bisect with 'gdalinfo my_file.tif' and found first broken commit.
git 1f0d59a
svn: trunk@28198

[rouault]

Should be fixed per https://trac.osgeo.org/gdal/ticket/6490 . My fix is a bit more restrictive, but you spotted the right place.