cunit gdal warning messages

[robe]

/geos/rel-3.5.0w64gcc48/include -I/projects/postgresql/rel/pg9.3w64gcc48/include -I/projects/rel-libiconv-1.13.1w64gcc48/include -I.. -c -o cu_gdal.o cu_gdal.c
cu_gdal.c: In function 'test_gdal_rasterize':
cu_gdal.c:70:3: warning: unknown conversion type character 'h' in format [-Wformat=]
   sscanf(pos, "%2hhx", &wkb[i]);
   ^
cu_gdal.c:70:3: warning: too many arguments for format [-Wformat-extra-args]
x86_64-w64-mingw32-gcc -g -O2  -Wall -Wmissing-prototypes  -I../../rt_core  -I../../../liblwgeom  -I/projects/proj/rel-4.9.1w64gcc48/include  -I/projects/gdal/rel-2.0w64gcc48/include  -I/projects/geos/rel-3.5.0w64gcc48/include -I/projects/postgresql/rel/pg9.3w64gcc48/include -I/projects/rel-libiconv-1.13.1w64gcc48/include -I.. -c -o cu_spatial_relationship.o cu_spatial_relationship.c
x86_64-w64-mingw32-gcc -g -O2  -Wall -Wmissing-prototypes  -I../../rt_core  -I../../../liblwgeom  -I/projects/proj/rel-4.9.1w64gcc48/include  -I/projects/gdal/rel-2.0w64gcc48/include  -I/projects/geos/rel-3.5.0w64gcc48/include -I/projects/postgresql/rel/pg9.3w64gcc48/include -I/projects/rel-libiconv-1.13.1w64gcc48/include -I.. -c -o cu_mapalgebra.o cu_mapalgebra.c
x86_64-w64-mingw32-gcc -g -O2  -Wall -Wmissing-prototypes  -I../../rt_core  -I../../../liblwgeom  -I/projects/proj/rel-4.9.1w64gcc48/include  -I/projects/gdal/rel-2.0w64gcc48/include  -I/projects/geos/rel-3.5.0w64gcc48/include -I/projects/postgresql/rel/pg9.3w64gcc48/include -I/projects/rel-libiconv-1.13.1w64gcc48/include -I.. -c -o cu_misc.o cu_misc.c

Seeing this on winnie.

[robe]

Still see it on winnie, but too dangerous to fix for 2.2

[robe]

still present

[Raul Marin]

In 17510:

Raster cunit: Address scanf warning on Windows

Closes #3252