ofz#68840 another putcontig8bitYCbCr22tile issue

Change-Id: I6e119cf1b3bec609f94784eb0c439835875d6112
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/168031
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

external/libtiff/UnpackedTarball_libtiff.mk

@@ -17,6 +17,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,libtiff,\
     external/libtiff/libtiff.linknolibs.patch \
     external/libtiff/0001-ofz-54685-Timeout.patch \
     external/libtiff/ofz65182.patch \
+    external/libtiff/ofz68840.patch \
 ))
 
 # vim: set noet sw=4 ts=4:

external/libtiff/ofz68840.patch

@@ -0,0 +1,17 @@
+--- a/libtiff/tif_tile.c
++++ b/libtiff/tif_tile.c
+@@ -233,7 +233,13 @@
+             _TIFFMultiply64(tif, samplingrow_size, samplingblocks_ver, module));
+     }
+     else
+-        return (_TIFFMultiply64(tif, nrows, TIFFTileRowSize64(tif), module));
++    {
++        uint64_t row_size = TIFFTileRowSize64(tif);
++        /* I think the way this works the expectation is there are always even num of samples */
++        if (td->td_photometric == PHOTOMETRIC_YCBCR)
++            row_size = TIFFroundup_64(row_size, 2);
++        return (_TIFFMultiply64(tif, nrows, row_size, module));
++    }
+ }
+ tmsize_t TIFFVTileSize(TIFF *tif, uint32_t nrows)
+ {