bashrc: short-circuit version comparisons

[OFB] /home/grawity
$ declare -p BASH_VERSINFO
declare -ar BASH_VERSINFO='([0]="2" [1]="05b" [2]="0" [3]="1" [4]="release" [5]="i386-pc-linux-gnu")'

[OFB] /home/grawity
$ (( ${BASH_VERSINFO[0]} < 4 || ${BASH_VERSINFO[1]} < 3 ))
-bash: 2 < 4 || 05b: value too great for base (error token is "05b")
git: add an alias
XCompose: add ✔