Bug with binstats -Cn and binary input.

[Esteban82]

gmt binstats -Cn needs a table with 2 columns. This works fine with ascii data. But it failts when I use binary data.
If I use -bic it creates a grid but it is wrong. If I use -bi2c then I got this error:

gmtbinstats [ERROR]: Binary input data (-bi) provides 2 but must have at least 3 columns

Full script

cat << 'EOF' > data.txt
1 1
2 2
3 3
EOF

gmt convert data.txt -boc > data.bin

gmt binstats data.txt     -fg -R0/3/0/3 -Gtxt.nc -S2 -I1 -Cn -Vi
gmt binstats data.bin -bic -fg -R0/3/0/3 -Gbin.nc -S2 -I1 -Cn -Vi
gmt binstats data.bin -bi2c -fg -R0/3/0/3 -Gbin.nc -S2 -I1 -Cn -Vi